Pyrimidine derivatives, process for preparing the same and herbicide using the same

ABSTRACT

Disclosed are a pyrimidine or triazine compound represented by the following formula (I): ##STR1## wherein R 1  represents cyano group, a halogen atom, hydroxy group or --O--R 7  where R 7  represents a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group; R 2  represents hydrogen atom or a lower alkyl group; R 3  represents hydrogen atom or a lower alkyl group; R 4  represents a 1-imidazolyl group, --NHSO 2  --R 8  where R 8  represents a lower alkyl group or a phenyl group which may have a substituent, hydroxy group, a lower alkoxy group or a benzyloxy group when Z is nitrogen atom; or a 1-imidazolyl group, --NHSO 2  --R 8  where R 8  has the same meaning as defined above, hydroxy group, OK, a lower alkoxy group which may have a substituent, a lower alkenyloxy group, a lower alkynyloxy group, a cycloalkoxy group which may have a substituent, a phenoxy group, a benzyloxy group, a lower alkylthio group, a phenylthio group or an alkylsulfonylamino group when Z is --CH═ group; R 5  represents a lower alkoxy group; R 6   represents a lower alkoxy group or a lower alkyl group; X represents oxygen atom or sulfur atom; and Z represents nitrogen atom or --CH═ group. processes for preparing the same and a herbicide containing the same as an active ingredient(s).

BACKGROUND OF THE INVENTION

This invention relates to a herbicide containing a novel pyrimidine ortriazine derivative such as 3-alkoxybutyrylimidazole derivatives,3-alkoxyalkanoic acid amide derivatives, 3-alkoxyalkanoic acidderivatives and 2-pyrimidinylthioalkanoic acid derivatives as an activeingredient.

Many herbicides have heretofore been developed for promotinglabor-saving of farm practices and increase in productivity of crops.Conventional herbicides are, however, not sufficient in herbicidaleffect, e.g. insufficient in selective herbicidal effect to crops suchas cotton, and also not sufficiently satisfactory in the point of safetyto creatures. Thus, in order to solve these problems, development of anovel herbicide has been demanded.

3-Alkoxybutyrylimidazole derivatives, 3-alkoxyalkanoic acid amidederivatives and 3-alkoxyalkanoic acid derivatives of the presentinvention are novel compounds and their herbicidal effect have not yetbeen known.

As a compound similar to the 2-pyrimidinylthioalkanoic acid derivativeof the present invention, there has been known, for example, compoundsdisclosed in Japanese Provisional Patent Publication No. 85262/1990, andit has been also known that these compounds have herbicidal activities.However, herbicidal effects of these compounds are insufficient, andthus, it has been desired to develop a novel herbicide having moreexcellent activities.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a novel pyrimidine ortriazine derivative, a process for preparing the same and a herbicidecontaining said compound as an active ingredient.

The present inventors have studied intensively in order to solve theabove problems, and consequently found that a novel pyrimidine ortriazine derivative shows more excellent herbicidal effect againstannual rice plant weeds and annual broad-leaved weeds and showsselectivity to crops such as cotton, and also found a process forpreparing the same with high yields, to accomplish the presentinvention.

The present invention is described below.

That is, the first invention is concerned to a 3-alkoxyalkanoic acidderivative represented by the following formula (I): ##STR2## wherein R¹represents cyano group, a halogen atom, hydroxy group or --O--R⁷ whereR⁷ represents a lower alkyl group, a lower alkenyl group, a loweralkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group; R²represents hydrogen atom or a lower alkyl group; R³ represents hydrogenatom or a lower alkyl group; R⁴ represents a 1-imidazolyl group, --NHSO₂--R⁸ where R⁸ represents a lower alkyl group or a phenyl group which mayhave a substituent, hydroxy group, a lower alkoxy group or a benzyloxygroup when Z is nitrogen atom; or a 1-imidazolyl group, --NHSO₂ --R⁸where R⁸ has the same meaning as defined above, hydroxy group, OK, alower alkoxy group which may have a substituent, a lower alkenyloxygroup, a lower alkynyloxy group, a cycloalkoxy group which may have asubstituent, a phenoxy group, a benzyloxy group, a lower alkylthiogroup, a phenylthio group or an alkylsulfonylamino group when Z is --CH═group; R⁵ represents a lower alkoxy group; R⁶ represents a lower alkoxygroup or a lower alkyl group; X represents oxygen atom or sulfur atom;and Z represents nitrogen atom or --CH═ group.

The second invention is concerned to a 3-alkoxybutyrylimidazolederivative represented by the following formula (Ia): ##STR3## whereinR⁷, R³, X and Z each have the same meanings as defined above.

The third invention is concerned to a 3-alkoxyalkanoic acid amidederivative represented by the following formula (Ib): ##STR4## whereinR⁷, R³, R⁸, X and Z each have the same meanings as defined above.

The fourth invention is concerned to a triazine derivative representedby the following formula (Ic): ##STR5## wherein R⁴ ' represents hydroxygroup, a lower alkoxy group or a benzyloxy group; R², R⁶, R⁷ and X eachhave the same meanings as defined above.

The fifth invention is concerned to a 2-pyrimidinylthioalkanoic acidderivative represented by the following formula (Id): ##STR6## whereinR¹ ' represents cyano group or a halogen atom; R² represents a loweralkyl group; R⁴ " represents hydroxy group, OK, a lower alkoxy groupwhich may have a substituent, a lower alkenyloxy group, a loweralkynyloxy group, a cycloalkoxy group which may have a substituent, aphenoxy group, a benzyloxy group, a lower alkylthio group, a phenylthiogroup, a 1-imidazolyl group or --NHSO₂ --R⁸ where R⁸ has the samemeaning as defined above; R⁶ ' represents a lower alkoxy group; R³ andR⁵ each have the same meanings as defined above.

The sixth invention is concerned to a3-hydroxy-2-pyrimidinylthioalkanoic acid derivative represented by thefollowing formula (Ie): ##STR7## wherein R², R³, R⁴ ', R⁵ and R⁶ ' eachhave the same meanings as defined above.

The seventh invention is concerned to a process for preparing the3-alkoxyalkanoic acid derivative represented by the above formula (Ia),which comprises reacting a compound represented by the following formula(II): ##STR8## wherein R⁷, R³, X and Z each have the same meanings asdefined above,

with N,N'-carbonyldiimidazole.

The eighth invention is concerned to a process for preparing the3-alkoxyalkanoic acid amide derivative represented by the above formula(Ib), which comprises reacting the 3-alkoxyalkanoic acid derivativerepresented by the above formula (Ia) with a compound represented by thefollowing formula (III):

    NH.sub.2 SO.sub.2 R.sup.8                                  (III)

wherein R⁸ has the same meaning as defined above.

The ninth invention is concerned to a process for preparing the triazolederivative represented by the above formula (Ic), which comprisesreacting a compound represented by the following formula (IV): ##STR9##wherein R², R⁴ ', R⁷ and X each have the same meanings as defined above,

with a compound represented by the following formula (V): ##STR10##wherein R⁶ has the same meaning as defined above.

The tenth invention is concerned to a process for preparing theimidazole derivative represented by the above formula (Ic), whichcomprises reacting a compound represented by the following formula (IV):##STR11## wherein R², R⁴ ' and R⁷ each have the same meanings as definedabove, and R⁹ represents a lower alkyl group, a substituted phenyl groupor a halo-lower alkyl group,

with a compound represented by the following formula (V): ##STR12##wherein R⁶ has the same meaning as defined above.

The eleventh invention is concerned to a process for preparing thetriazole derivative represented by the above formula (Ic), whichcomprises subjecting to interesterification of a compound represented bythe following formula (VIII): ##STR13## wherein R², R⁶, R⁷ and X eachhave the same meanings as defined above, and R¹⁰ represents a loweralkyl group.

The twelfth invention is concerned to a process for preparing thetriazole derivative represented by the above formula (Ic), whichcomprises subjecting to hydrogenolysis of a compound represented by thefollowing formula (IX): ##STR14## wherein R², R⁶, R⁷ and X each have thesame meanings as defined above.

The thirteenth invention is concerned to a process for preparing a3-halogeno-2-pyrimidinylthioalkanoic acid derivative represented by thefollowing formula (Id'): ##STR15## wherein Y represents a halogen atom;R², R³, R^(4'), R⁵ and R^(6') each have the same meanings as definedabove,

which comprises reacting the 3-hydroxy-2-pyrimidinylthioalkanoic acidderivative represented by the above formula (Ie) with a halogenatingagent.

The fourteenth invention is concerned to a process for preparing a3-cyano-2-pyrimidinylthioalkanoic acid derivative represented by thefollowing formula (Id"): ##STR16## wherein R², R³, R^(4'), R⁵ and R^(6')each have the same meanings as defined above,

which comprises reacting the 3-halogeno-2-pyrimidinylthioalkanoic acidderivative represented by the above formula (Id') with a cyanizingagent.

The fifteenth invention is concerned to a process for preparing the3-hydroxy-2-pyrimidinylthioalkanoic acid derivative represented by theabove formula (Ie) which comprises reacting a compound represented bythe formula (X): ##STR17## wherein R² and R³ each have the same meaningsas defined above, with a compound represented by the following formula(XI): ##STR18## wherein R^(4"), R⁵ and R^(6') each have the samemeanings as defined above.

The sixteenth invention is concerned to a herbicide comprising thepyrimidine or triazine derivative represented by the above formula (I)as an active ingredient.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

In the following, the present invention is explained in detail.

In the novel pyrimidine or triazine derivative (I) including thecompounds of the formulae (Ia) to (Ie) which are the desired compoundsof the present invention and the compounds (II) to (VII) which arestarting materials thereof, R¹, R^(1'), R², R³, R⁴, R^(4'), R^(4"), R⁵,R⁶, R^(6'), R⁷, R⁸, X, Y and Z are as described below.

As R¹ there may be mentioned cyano group, a halogen atom (fluorine atom,chlorine atom, bromine atom and iodine atom), hydroxy group, or --O--R⁷.As R⁷, there may be mentioned a lower alkyl group, a lower alkenylgroup, a lower alkynyl group, a halo-lower alkyl group and a cyano-loweralkyl group, and as a lower alkyl group, preferably a straight orbranched alkyl group having 1 to 6 carbon atoms, more preferably thosehaving 1 to 4 carbon atoms, particularly preferably those having 1 to 3carbon atoms (e.g. methyl group, ethyl group, n-propyl group andi-propyl group); as a lower alkenyl group, preferably a straight orbranched alkenyl group having 2 to 6 carbon atoms, more preferably thosehaving 2 to 5 carbon atoms, particularly preferably those having 2 to 3carbon atoms (e.g. propenyl group); as a lower alkynyl group, preferablya straight or branched alkynyl group having 2 to 6 carbon atoms, morepreferably those having 2 to 5 carbon atoms, particularly preferablythose having 2 to 3 carbon atoms (e.g. propynyl group); as a halo-loweralkyl group, preferably a straight or branched haloalkyl group having 1to 6 carbon atoms (as the halogen atom, there may be mentioned fluorineatom, chlorine atom, bromine atom and iodine atom, but chlorine atom ismore preferred), more preferably those having 1 to 5 carbon atoms,particularly preferably those having 1 to 3 carbon atoms (e.g.chloroethyl group and chloropropyl group); and as a cyano-lower alkylgroup, preferably a straight or branched cyanoalkyl group having 1 to 6carbon atoms, more preferably those having 1 to 5 carbon atoms,particularly preferably those having 1 to 3 carbon atoms (e.g.cyanoethyl group).

As R², there may be mentioned a lower alkyl group, and the lower alkylgroup is preferably a straight or branched alkyl group having 1 to 6carbon atoms; more preferably those having 1 to 4 carbon atoms,particularly preferably those having 1 to 3 carbon atoms (e.g. methylgroup, ethyl group, n-propyl group and i-propyl group) and methyl groupis most preferred.

As R³, there may be mentioned hydrogen atom and a lower alkyl group, andthe lower alkyl group is preferably a straight or branched alkyl grouphaving 1 to 6 carbon atoms; more preferably those having 1 to 4 carbonatoms, particularly preferably those having 1 to 3 carbon atoms (e.g.methyl group and ethyl group).

When Z represents nitrogen atom, as R⁴, there may be mentioned a1-imidazolyl group as in the formula (Ia), --NHSO₂ --R⁸ (analkylsulfonylamino group or an arylsulfonylamino group) where R⁸represents a lower alkyl group or a phenyl group which may have asubstituent as in the formula (Ib), hydroxy group, a lower alkoxy groupor a benzyloxy group as in the formula (Ic). The lower alkyl group of R⁸is preferably a straight or branched alkyl group having 1 to 6 carbonatoms; more preferably those having 1 to 4 carbon atoms (e.g. methylgroup, ethyl group, n-propyl group, isopropyl group and n-butyl group).As the substituent for the phenyl group of R⁸, there may be mentioned,for example, a straight or branched alkyl group having 1 to 6 carbonatoms (more preferably those having 1 to 4 carbon atoms, most preferablymethyl group) and a halogen atom (fluorine atom, chlorine atom, bromineatom and iodine atom, preferably chlorine atom). The lower alkoxy groupis preferably a straight or branched alkoxy group having 1 to 6 carbonatoms, more preferably those having 1 to 4 carbon atoms, particularlypreferably those having 1 to 3 carbon atoms (e.g. methoxy group andethoxy group).

When Z represents --CH═, as R⁴ there may be mentioned a 1-imidazolylgroup as in the formula (Ia), --NHSO₂ --R⁸ as in the formula (Ib),hydroxy group, OK, a lower alkoxy group which may have a substituent, alower alkenyloxy group, a lower alkynyloxy group, a cycloalkoxy groupwhich may have a substituent, a phenoxy group, a benzyloxy group, alower alkylthio group, a phenylthio group or an alkylsulfinylamino groupas in the formulae (Id) and (Ie). Here, R⁸ is the same as mentionedabove. As the carbon number in the lower alkoxy group, lower alkylthiogroup and alkylsulfonylamino group, preferably a straight or branchedone having 1 to 6, more preferably 1 to 4, particularly preferably 1 to3 carbon atoms; as the substituent for the lower alkoxy group, there maybe mentioned a straight or branched lower alkoxy group having 1 to 6(preferably 1 to 4, more preferably 1 to 3) carbon atoms and a loweralkylsilyl group (e.g. trimethylsilyl group); as the lower alkenylgroup, preferably a straight or branched one having 2 to 6, morepreferably 2 to 4, particularly preferably 2 to 3 carbon atoms (e.g.propenyl group); as the lower alkynyl group, preferably a straight orbranched one having 2 to 6, more preferably 2 to 4, particularlypreferably 2 to 3 carbon atoms (e.g. propynyl group); as the cycloalkoxygroup, preferably those having 3 to 10, more preferably 3 to 8,particularly preferably 4 to 6 carbon atoms; and as the substituent forthe cycloalkoxy group, there may be mentioned a halogen atom, preferablychlorine atom.

As R⁵, there may be mentioned methoxy group as in the formulae (Ia) to(Ic), or a straight or branched lower alkoxy group having 1 to 6 carbonatoms, and the number of the carbon atoms in the lower alkoxy group ispreferably 1 to 4, more preferably 1 to 3 (e.g. methoxy group).

As R⁶, there may be mentioned methoxy group as in the formulae (Ia) and(Ib), or a lower alkyl group or a lower alkoxy group as in the formulae(Ic) to (Ie). As the lower alkyl group, there may be mentioned astraight or branched alkyl group having 1 to 6, more preferably 1 to 4,particularly preferably 1 to 3 carbon atoms (e.g. methyl and ethylgroup), and the lower alkoxy group is preferably a straight or branchedalkoxy group having 1 to 6, more preferably 1 to 4, particularlypreferably 1 to 3 carbon atoms (e.g. methoxy group and ethoxy group).

As R⁹ in the formula (VI), there may be mentioned a lower alkyl group, asubstituted phenyl group and a halo-lower alkyl group, and as the loweralkyl group of the lower alkyl group and the halo-lower alkyl group,preferred are straight or branched one having 1 to 6 carbon atoms, morepreferably 1 to 4 carbon atoms, particularly preferably 1 to 3 carbonatoms (e.g. methyl group and ethyl group); and as the substituent of thesubstituted phenyl group, there may be mentioned a straight or branchedalkyl group having 1 to 6, preferably 1 to 4, more preferably 1 to 3carbon atoms.

As R¹⁰ in the formula (VIII), there may be mentioned a lower alkylgroup, and preferably a straight or branched one having 1 to 6 carbonatoms, more preferably 1 to 4 carbon atoms, particularly preferably 1 to3 carbon atoms (e.g. methyl group and ethyl group).

As X, there may be mentioned oxygen atom and sulfur atom.

As Z, there may be mentioned nitrogen atom and --CH═ (methyn group).

As Y in the formula (Id), there may be mentioned a halogen atom (e.g.fluorine atom, chlorine atom, bromine atom and iodine atom, butpreferably chlorine atom)

The novel pyrimidine or triazine derivative (I) which is a desiredcompound may include an optical isomer based on an asymmetric carbonatom.

The compound (I) can be prepared by, for example, Preparation method 1to Preparation method 11 shown below.

Preparation method 1 ##STR19## wherein R³, R⁷, X and Z each have thesame meanings as defined above.

The compound (Ia) can be prepared by reacting the starting compound (II)with N,N'-carbonyldiimidazole in a solvent.

The compound (II) can be prepared easily by, for example, reacting2-hydroxyalkanoic acid derivative or 2-mercaptoalkanoic acid derivativewith a 2-methylsulfonylpyridine or a 2-chlorotriazine according to themethod described in Japanese Patent Application No. 279328/1990 as shownbelow. ##STR20## wherein R³, R⁷, X and Z each have the same meanings asdefined above, and W represents chlorine atom or CH₃ SO₂ --.

As the compound (II), there may be mentioned, for example, therespective compounds (referred to as Compounds (II)₁ to (II)₃₈)comprising the respective kinds of substituted groups corresponding toCompounds No. 1 to No. 38 shown in Table 1 (for example, the compound(II) corresponding to Compound No. 1 is referred to as Compound (II)₁,and this Compound (II)₁ means a compound wherein R⁷ is CH₃, R³ is H , Xis O and Z is CH in the compound (II)).

The solvent is not particularly limited so long as it does notparticipate in the present reaction directly, and may include, forexample, water; ethers such as diethyl ether, tetrahydrofuran and1,4-dioxane; ketones such as acetone, methyl ethyl ketone and methylisobutyl ketone; nitriles such as acetonitrile; bipolar aprotic solventssuch as N,N-dimethylformamide, N,N'-dimethyl-2-imidazolidinone anddimethyl sulfoxide; halogenated alkyl solvents such as chloroform andmethylene chloride; and a mixture of the above solvents.

The reaction for preparing the compound (Ia) can be carried out at areaction concentration of 5 to 80%.

In the preparation method, the ratio of using the starting compound (II)and N,N'-carbonyldiimidazole is that 0.5 to 2 mole, preferably 1 to 1.5mole of N,N'-carbonyldiimidazole per mole of the starting compound (II).

The reaction temperature is not particularly limited so long as it is aboiling point of a solvent to be used or lower, but the reaction can becarried out generally at 0° to 80° C., preferably 5° to 50° C.

The reaction time varies depending on the above concentration andtemperature, but may be generally carried out within 0.5 to 10 hours.

As the compound (Ia), there may be mentioned, for example, therespective compounds (referred to as Compounds 1 to 38) comprising therespective kinds of substituted groups corresponding to Compounds No. 1to No. 38 shown in Table 1 (for example, the compound (I) correspondingto Compound No. 1 is referred to as Compound 1, and this Compound 1means a compound wherein R⁷ is CH₃, R³ is H, X is O and Z is CH in thecompound (I)).

Preparation method 2 ##STR21## wherein R³, R⁷, R⁸, X and Z each have thesame meanings as defined above.

The compound (Ib) can be prepared by reacting the compound (Ia) with analkylsulfonylamine or an arylsulfonyl amine represented by the formula(III) in a solvent in the presence of a base.

The compound of the formula (III) can be easily prepared by reacting acorresponding sulfonyl chloride and ammonia.

As the compound (III), there may be mentioned, for example, therespective compounds (referred to as Compounds (III)₃₉ to (III)₁₄₀)comprising the respective kinds of substituted groups corresponding toCompounds No. 39 to No. 140 shown in Table 1, (for example, the compound(III) corresponding to Compound No. 41 is referred to as Compound(III)₄₁, and this Compound (III)₄₁ means a compound wherein R⁸ is CH₃ inthe compound (III)).

The solvent is not particularly limited so long as it does notparticipate in the present reaction directly, and may include, forexample, ethers such as diethyl ether, tetrahydrofuran and 1,4-dioxane;ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone;nitriles such as acetonitrile; bipolar aprotic solvents such asN,N-dimethylformamide, N,N'-dimethyl-2-imidazolidinone and dimethylsulfoxide; and a mixture of the above solvents.

As the base, there may be mentioned, for example, inorganic bases suchas sodium amide, sodium hydroxide, potassium hydroxide, potassiumcarbonate, sodium carbonate and sodium hydride.

The reaction for preparing the compound (Ib) can be carried out at areaction concentration of 5 to 80%.

In the preparation method, the ratio of using the starting compound (Ia)and the compound (III) is that 0.5 to 2 mole, preferably 1 to 1.5 moleof the compound (III) per mole of the starting compound (Ia).

The reaction temperature is not particularly limited so long as it is aboiling point of a solvent to be used or lower, but the reaction can becarried out generally at 0° to 50° C.

The reaction time varies depending on the above concentration andtemperature, but may be generally carried out within 1 to 10 hours.

As the compound (Ib), there may be mentioned, for example, therespective compounds (referred to as Compounds 39 to 120) comprising therespective kinds of substituted groups corresponding to Compounds No. 39to No. 140 shown in Table 1 (for example, the compound (I) correspondingto Compound No. 41 is referred to as Compound 41, and this Compound 41means a compound wherein R⁷ is CH₃, R³ is H, R⁸ is CH₃, X is S and Z isCH in the compound (I)).

Preparation method 3 ##STR22## wherein R², R^(4'), R⁶, R⁷ and X eachhave the same meanings as defined above.

The compound (Ic) can be generally prepared by reacting the startingcompound (IV) and the starting compound (V) in a solvent in the presenceof a base.

The compound (IV) wherein X is oxygen atom can be easily prepared, forexample, by reacting epoxyalkanoates prepared according to the methoddescribed in "Tetrahedron Letter", No. 36, p. 3761 (1972) or "Org.Syn.", IV, p. 459 in an alcohol in the presence of an acid catalyst(sulfuric acid or paratoluenesulfonic acid) as shown below. ##STR23##wherein R², R^(4') and R⁷ each have the same meanings as defined above.

Also, the compound (IV) wherein X is sulfur atom can be easily prepared,for example, by reacting a compound (IV') with sodium hydrosulfite in apolar solvent as shown below. ##STR24## wherein R², R^(4'), R⁷ and R⁹each have the same meanings as defined above.

As the compound (IV), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 141, 144, 145, 148, 149, 150,153, 154, 157, 158, 159, 162, 163, 164, 165, 167, 168, 169, 171, 172,175, 176, 179 and 180 (which are referred to as Compounds (IV)₁₄₁,(IV)₁₄₄, (IV)₁₄₅, (IV)₁₄₈, (IV)₁₄₉, (IV)₁₅₀, (IV)₁₅₃, (IV)₁₅₄, (IV)₁₅₇,(IV)₁₅₈, (IV)₁₅₉, (IV)₁₆₂, (IV)₁₆₃, (IV)₁₆₄, (IV)₁₆₅, (IV)₁₆₇, (IV)₁₆₈,(IV)₁₆₉, (IV)₁₇₁, (IV)₁₇₂, (IV)₁₇₅, (IV)₁₇₆, (IV)₁₇₉ and (IV)₁₈₀,respectively) shown in Table 1 (for example, the compound (IV)corresponding to Compound No. 144 is referred to as Compound (IV)₁₄₄,and this Compound (IV)₁₄₄ means a compound wherein R⁷ is CH₃, R² is H,R^(4') is OH and X is S in the compound (IV)).

The compound (V) wherein R⁶ is an alkoxy group can be easily prepared,for example, by reacting a cyanuric acid and an alkylalcoholate as shownbelow. ##STR25## wherein R¹¹ represents an alkyl group and M representsan alkali metal.

The compound (V) wherein R⁶ is an alkyl group can be easily prepared,for example, by reacting a cyanuric acid with a grignard reagent andfurther reacting sodium methoxide thereto as shown below. ##STR26##wherein R¹² represents an alkyl group and Y represents a halogen atom.

As the compound (V) , there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 141, 144, 145, 148, 149, 150,153, 154, 157, 158, 159, 162, 163, 164, 165, 167, 168, 169, 171, 172,175, 176, 179 and 180 (which are referred to as Compounds (V)₁₄₁,(V)₁₄₄, (V)₁₄₅, (V)₁₄₈, (V)₁₄₉, (V)₁₅₀, (V)₁₅₃, (V)₁₅₄, (V)₁₅₇, (V)₁₅₈,(V)₁₅₉, (V)₁₆₂, (V)₁₆₃, (V)₁₆₄, (V)₁₆₅, (V)₁₆₇, (V)₁₆₈, (V)₁₆₉, (V)₁₇₁,(V)₁₇₂, (V)₁₇₅, (V)₁₇₆, (V)₁₇₉ and (V)₁₈₀, respectively) shown in Table1 (for example, the compound (V) corresponding to Compound No. 144 isreferred to as Compound (V)₁₄₄, and this Compound (V)₁₄₄ means acompound wherein R⁶ is OCH₃ in the compound (V)).

The solvent is not particularly limited so long as it does notparticipate in the present reaction directly, and may include, forexample, water; ethers such as diethyl ether, tetrahydrofuran and1,4-dioxane; ketones such as acetone, methyl ethyl ketone and methylisobutyl ketone; nitriles such as acetonitrile; bipolar aprotic solventssuch as N,N-dimethylformamide, N,N'-dimethyl-2-imidazolidinone anddimethyl sulfoxide; and a mixture of the above solvents.

As the base, there may be mentioned an organic base such astriethylamine, pyridine and N,N-diethylaniline; and an inorganic basesuch as sodium amide, sodium hydroxide, potassium hydroxide, potassiumcarbonate, sodium carbonate and sodium hydride.

The reaction for preparing the compound (Ic) can be carried out at areaction concentration of 5 to 80%.

In the preparation method, the ratio of using the starting compounds(IV) and (V) is that 0.5 to 2 mole, preferably 1 to 1.5 mole of thestarting compound (V) per mole of the starting compound (IV).

The reaction temperature is not particularly limited so long as it is aboiling point of a solvent to be used or lower, but the reaction can becarried out generally at 0° to 50° C., and the reaction time can beshortened by heating.

The reaction time varies depending on the above concentration andtemperature, but may be generally carried out within 0.5 to 10 hours.

As the compound (Ic), there may be mentioned, for example, therespective compounds (referred to as Compounds 141 to 180) comprisingthe respective kinds of substituted groups corresponding to CompoundsNo. 141 to No. 180 shown in Table 1 (for example, the compound (I)corresponding to Compound No. 144 is referred to as Compound 144, andthis Compound 144 means a compound wherein R⁷ is CH₃, R² is H, R^(4') isOH, R⁶ is OCH₃ and X is S in the compound (I)).

Preparation method 4 ##STR27## wherein R², R^(4'), R⁶, R⁷ and R⁹ eachhave the same meanings as defined above.

The compound (Ic) can be prepared by using a starting compound (VIII) inplace of the compound (IV) in Preparation method 3 and using a startingcompound (IX) in place of the compound (V) in the same and reactingthem.

The compound (VIII) can be easily prepared, for example, by reacting thecompound (IV) and sulfonyl chloride in a suitable solvent in thepresence of a base catalyst as shown below. ##STR28## wherein R²,R^(4'), R⁷ and R⁹ each have the same meanings as defined above.

As the compound (VIII), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 144, 148, 153, 157, 158, 162,164, 167, 168, 171, 175, 179 and 180 (which are referred to as Compounds(VIII)₁₄₄, (VIII)₁₄₈, (VIII)₁₅₃, (VIII)₁₅₇, (VIII)₁₅₈, (VIII)₁₆₂,(VIII)₁₆₄, (VIII)₁₆₇, (VIII)₁₆₈, (VIII)₁₇₁, (VIII)₁₇₅, (VIII)₁₇₉ and(VIII)₁₈₀, respectively) shown in Table 1 (for example, the compound(VIII) corresponding to Compound No. 148 is referred to as Compound(VIII)₁₄₈, and this Compound (VIII)₁₄₈ means a compound wherein R² andR⁷ are both CH₃, and R⁹ is a corresponding 4-methylphenyl in thecompound (VIII)).

The compound (IX) can be easily prepared, for example, by adding sodiumhydrosulfide to the compound (VI) in water or an alcohol and heating themixture under stirring.

As the compound (IX), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 144, 148, 153, 157, 158, 162,164, 167, 168, 171, 175, 179 and 180 (which are referred to as Compounds(IX)₁₄₄, (IX)₁₄₈, (IX)₁₅₃, (IX)₁₅₇, (IX)₁₅₈, (IX)₁₆₂, (IX)₁₆₄, (IX)₁₆₇,(IX)₁₆₈, (IX)₁₇₁, (IX)₁₇₅, (IX)₁₇₉ and (IX)₁₈₀, respectively) shown inTable 1 (for example, the compound (IX) corresponding to Compound No.148 is referred to as Compound (IX)₁₄₈, and this Compound (IX)₁₄₈ meansa compound wherein R⁶ is OCH₃ in the compound (IX)).

The reaction can be carried out by using the same solvent, base,reaction temperature and reaction time as mentioned in Preparationmethod 3.

Preparation method 5 ##STR29## wherein R²,R^(4'), R⁶ and R⁷ each havethe same meanings as defined above, and R¹³ represents a lower alkylgroup.

In general, the compound (Ic) can be easily prepared by subjecting acompound (X) to interesterification reaction with benzyl alcohol in asolvent using titanium tetraalkoxide as a catalyst.

The compound (X) can be easily prepared, for example, according to theabove Preparation method 3.

As the compound (X), there may be mentioned, for example, the respectivecompounds comprising the respective kinds of substituted groupscorresponding to Compounds Nos. 142, 146, 151, 155, 160, 166, 170, 173and 177 (which are referred to as Compounds (X)₁₄₂, (X)₁₄₆, (X)₁₅₁,(X)₁₅₅, (X)₁₆₀, (X)₁₆₆, (X)₁₇₀, (X)₁₇₃ and (X)₁₇₇, respectively) shownin Table 1 (for example, the compound (X) corresponding to Compound No.151 is referred to as Compound (X)₁₅₁, and this Compound (X)₁₅₁ means acompound wherein R² is CH₃, R⁷ is C₂ H₅, R^(4') is ##STR30## and R⁶ isOCH₃ in the compound (X)).

The solvent is not particularly limited so long as it does notparticipate in the present reaction directly, and may include, forexample, aromatic hydrocarbons such as benzene, toluene and xylene.

As the catalyst, there may be mentioned titanium tetraisopropoxide andtitanium tetra-n-propoxide.

The preparation of the compound (Ic) can be carried out at a reactionconcentration of 5 to 80%.

In the preparation method, the ratio of using the starting compound (X)and benzyl alcohol is that 1 to 3 moles, preferably 1.5 to 2 moles ofthe benzyl alcohol per mole of the starting compound (X).

The reaction temperature is not particularly limited so long as it is aboiling point of a solvent to be used or lower, but the reaction can becarried out generally at 70° to 150° C.

The reaction time varies depending on the above concentration andtemperature, but may be generally carried out within 2 to 20 hours.

Preparation method 6 ##STR31## wherein R², R⁶, R⁷ and X each have thesame meanings as defined above.

The compound (Ic) can be easily prepared by subjecting the compound (IX)to hydrogenolysis at normal pressure by using a palladium-carbon as acatalyst.

The compound (IX) can be easily prepared, for example, according to theabove Preparation method 5.

As the compound (IX), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 143, 147, 152, 156, 161, 174 and178 (which are referred to as Compounds (IX)₁₄₃, (IX)₁₄₇, (IX)₁₅₂,(IX)₁₅₆, (IX)₁₆₁, (IX)₁₇₄ and (IX)₁₇₈, respectively) shown in Table 1(for example, the compound (IX) corresponding to Compound No. 147 isreferred to as Compound (IX)₁₄₇, and this Compound (IX)₁₄₇ means acompound wherein R² and R⁷ are both CH₃, R⁶ is OCH₃ in the compound(IX)).

The solvent is not particularly limited so long as it does notparticipate in the present reaction directly, and may include, forexample, chlorinated or not chlorinated aromatic hydrocarbons such asbenzene, toluene, xylene and chlorobenzene; ethers such astetrahydrofuran; alcohols such as metanol and ethanol.

As the catalyst, there may be mentioned palladium-carbon.

The preparation of the compound (Ic) can be carried out at a reactionconcentration of 5 to 80%.

The reaction temperature is not particularly limited so long as it is aboiling point of a solvent to be used or lower, but the reaction can becarried out generally at 10° to 80° C., more preferably 20° to 50° C.

The reaction time varies depending on the above concentration andtemperature, but may be generally carried out within 0.5 to 12 hours.

Preparation method 7

The compound (Id') wherein R¹ in the formula (I) represents Y can beprepared by reacting the 3-hydroxy-2-pyrimidinylthioalkanoic acidderivative (Ie) with a halogenating agent.

The compound (Ie) can be prepared by reacting a corresponding ketone ofthe formula (X) with 2-pyrimidinylthioacetate of the formula (XI) in thepresence of lithium in a solvent.

As the compound (X), commercially available ones may be used.

As the compound (X), there may be mentioned, for example, the respectivecompounds comprising the respective kinds of substituted groupscorresponding to Compounds Nos. 181 to 195 (which are referred to asCompounds (X)₁₈₁ to (X)₁₉₅, respectively) shown in Table 1 (for example,the compound (X) corresponding to Compound No. 181 is referred to asCompound (X)₁₈₁, and this Compound (X)₁₈₁ means a compound wherein R²and R³ are both CH₃).

The compound (XI) can be easily prepared by reacting a thioglycolate and4,6-dimethoxy-2-methylsulfonylpyrimidine in the presence of a base in asolvent.

As the compound (XI), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 181 to 195 (which are referred toas Compounds (XI)₁₈₁ to (XI)₁₉₅, respectively) shown in Table 1 (forexample, the compound (XI) corresponding to Compound No. 181 is referredto as Compound (XI)₁₈₁, and this Compound (XI)₁₈₁ means a compoundwherein R⁵ and R^(6') are both OCH₃ and R^(4') is OC₂ H₄ Si (CH₃)₃ inthe compound (XI)).

The preparation of the compound (Ie) can be carried out at a reactionconcentration of 10 to 80%. In the preparation method, the ratio ofusing the starting compounds (X) and (XI) is that 1 to 2 mole,preferably 1.1 to 1.2 mole of the starting compound (XI) per mole of thestarting compound (X). The solvent may include, for example, dioxane,tetrahydrofuran (THF), diethylether and hexane. The reaction temperatureis preferably -60° to -20° C. The reaction time may be within 1 to 3hours under nitrogen stream while stirring.

As the compound (Ie), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 181 to 195 (which are referred toas Compounds (Ie)₁₈₁ to (Ie)₁₉₅, respectively) shown in Table 1 (forexample, the compound (Ie) corresponding to Compound No. 181 is referredto as Compound (Ie)₁₈₁, and this Compound (Ie)₁₈₁ means a compoundwherein R² and R³ are both CH₃, R⁵ and R^(6') are both OCH₃ and R^(4")is OC₂ H₅ in the compound (Ie)).

In the preparation of the compound (Id'), as the halogenating agent,there may be mentioned thionyl chloride, thionyl bromide, phosphorustrichloride, phosphorus tribromide, phosphorus triiodide, hydroiodicacid, 1,1,2,2-tetrafluoroethylenediamine, tetrabutylphosphoniumdihydrogen trifluoride, dimethylaminosulfur trifluoride and oxlalic acidchloride. The reaction may be carried out at a reaction concentration of5 to 80%. The ratio of the starting compound (Ie) and the halogenatingagent is that 1 to 3 mole, preferably 1.1 to 1.5 mole of thehalogenating agent per mole of the starting compound (Ie). When asolvent is used, it is not particularly limited so long as it is notreacted with the halogenating agent, and may include, for example,ethers such as diethyl ether, THF and dioxane; and halogenated aliphatichydrocarbons such as methylene chloride and chloroform. The reactiontemperature is not particularly limited but generally 0° to 100° C.,preferably 0° to 50° C. The reaction time may vary depending on theabove concentration and temperature, but generally 0.5 to 3 hours understirring.

As the compound (Id'), there may be mentioned, for example, therespective compounds comprising the respective kinds of substitutedgroups corresponding to Compounds Nos. 196 to 218 (which are referred toas Compounds (Id')₁₉₆ to (Id')₂₁₈, respectively) shown in Table 1 (forexample, the compound (Id') corresponding to Compound No. 196 isreferred to as Compound (Id')₁₉₆, and this Compound (Id')₁₉₆ means acompound wherein R² and R³ are both CH₃, R⁵ and R^(6') are both OCH₃,R^(4") is OC₂ H₅ and X is F in the compound (Id')).

Preparation method 8

The compound (Id") wherein R¹ in the formula (I) represents CN can beprepared by reacting the 3-halogeno-2-pyrimidinylthioalkanoic acidderivative (Id') with a cyanizing agent.

In the preparation of the compound (Id"), as the cyanizing agent, theremay be mentioned sodium cyanide, potassium cyanide and copper cyanide.The reaction may be carried out at a reaction concentration of 10 to80%. The ratio of the starting compound (Id') and the cyanizing agent isthat 1 to 2 mole, preferably 1.1 to 1.5 mole of the cyanizing agent permole of the starting compound (Id'). The solvent is not particularlylimited so long as it dissolves a small amount of water, and mayinclude, for example, DMF (N,N-dimethylformamide), DMSO(dimethylsulfoxide), DMAC (N,N-dimethylacetamide),1,3-dimethyl-2-imidazolidinone, acetone, acetonitrile, methanol andethanol. The reaction temperature is not particularly limited butpreferably 0° to 50° C. The reaction time may vary depending on theabove concentration and temperature, but generally 0.5 to 3 hours understirring.

As the compound (Id") obtained by the above preparation method, theremay be mentioned, for example, the respective compounds comprising therespective kinds of substituted groups corresponding to Compounds Nos.220 to 232, 234 to 235, 241 to 243, 247 to 248, 253 to 255, 257 to 258,261 to 262, 264 to 267, 269 to 271, 290 to 293 and 306 (which arereferred to as Compounds 220 to 232, 234 to 235, 241 to 243, 247 to 248,253 to 255, 257 to 258, 261 to 262, 264 to 267, 269 to 271, 290 to 293and 306, respectively) shown in Table 1 (for example, the compound (Id")corresponding to Compound No. 220 is referred to as Compound 220, andthis Compound 220 means a compound wherein R² and R³ are both CH₃ andR^(4"), R⁵ and R^(6') are all OCH₃ in the compound (Id")).

Preparation method 9

A compound represented by the following formula (Id"'): ##STR32##wherein R¹ in the formula (I) represents CN and R⁴ represents hydroxylgroup can be prepared by reacting the 3-cyano-2-pyrimidinylthioalkanoicacid ester (Id") with a base in a solvent.

In the preparation of the compound (Id"'), as the base, there may bementioned sodium hydroxide and potassium hydroxide. The reaction may becarried out at a reaction concentration of 10 to 80%. The ratio of thestarting compound (Id") and the base is that 1 to 2 mole, preferably 1to 1.2 mole of the base per mole of the starting compound (Id"). Thesolvent is not particularly limited so long as it dissolves a smallamount of water, and may include, for example, DMF, DMSO, DMAC,1,3-dimethyl-2-imidazolidinone, acetone, acetonitrile, methanol andethanol. The reaction temperature is not particularly limited butpreferably 0° to 60° C. The reaction time may vary depending on theabove concentration and temperature, but generally 1 to 6 hours understirring.

As the compound (Id"') obtained by the above preparation method, theremay be mentioned, for example, the respective compounds comprising therespective kinds of substituted groups corresponding to Compounds Nos.219, 252 and 260 (which are referred to as Compounds 219, 252 and 260,respectively) shown in Table 1 (for example, the compound (Id"')corresponding to Compound No. 219 is referred to as Compound 219, andthis Compound 219 means a compound wherein R² and R³ are both CH₃, R⁵and R^(6') are both OCH₃ and R^(4") is OH in the compound (Id"')).

Preparation method 10

The compound (Id) can be prepared by reacting the compound (Id"') withan alcohol, a thiol or an amine in a solvent existing a condensing agentin the presence or absence of a base with a cyanizing agent.

In the preparation of the compound (Id), as the condensing agent, theremay be mentioned DCC (dicyclohexylcarbodiimide), WSC(1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride),carbonyldiimidazole and diethyl cyanophosphate. The reaction may becarried out at a reaction concentration of 10 to 80%. The ratio of thestarting compound (Id"') and the condensing agent is that 1 to 2 mole,preferably 1 to 1.1 mole of the condensing agent per mole of thestarting compound (Id"'). As the base, there may be mentionedtriethylamine and sodium hydride and they may be added to the startingcompound (Id"') in an amount of 1 to 2 mole, preferably 1 to 1.2 moleper mole of the starting compound (Id"'). The solvent is notparticularly limited so long as it is non-aqueous one, and preferablyincludes methylene chloride, chloroform, toluene, benzene, THF and ethylether. The reaction temperature is not particularly limited butpreferably 0° C. to room temperature. The reaction time may varydepending on the above concentration and temperature, but generally 0.5to 6 hours under stirring.

As the compound (Id) obtained by the above preparation method, there maybe mentioned, for example, the respective compounds comprising therespective kinds of substituted groups corresponding to Compounds Nos.220 to 243, 247 to 248, 251, 253 to 258, 261 to 267, 269 to 273, 276 to281 and 289 to 304 (which are referred to as Compounds 220 to 243, 247to 248, 251, 253 to 258, 261 to 267, 269 to 273, 276 to 281 and 289 to304, respectively) shown in Table 1 ( for example, the compound (Id)corresponding to Compound No. 241 is referred to as Compound 241, andthis Compound 241 means a compound wherein R¹ is CN, R² and R³ are bothCH₃, R^(4") is NHSO₂ CH₃ and R⁵ and R^(6') are both OCH₃ in the compound(Id)).

Preparation method 11

The compound (Id) can be prepared by reacting a metal salt or an aminesalt of a compound represented by the formula (XII): ##STR33## with ahalogen-substituted alkyl compound in the presence or absence of acatalyst and in the presence of a base.

In the preparation method, as the catalyst, there may be mentioned acrown ether (e.g. 18-crown-6-ether) and a quaternary ammonium salt (e.g.tetrabutylammonium bromide); and as the base, there may be mentionedsodium hydroxide, potassium hydroxide, sodium hydride, metal sodium andtriethylamine. As the halogen-substituted alkyl compound, there may bementioned methoxymethyl chloride, methoxyethoxymethyl chloride,pivaloyloxymethyl chloride and methylthiomethyl chloride. The reactionmay be carried out at a reaction concentration of 10 to 80%. The ratioof the starting compound (XII) and the base is that 1 to 2 mole,preferably 1 to 1.1 mole of the base per mole of the starting compound(XII). The solvent is not particularly limited, and may include, forexample, DMF, DMSO, toluene, benzene, methylene chloride, chloroform,acetonitrile, THF and ethyl ether. The reaction temperature is notparticularly limited but preferably 0° to 100° C. The reaction time mayvary depending on the above concentration and temperature, but generally0.5 to 6 hours under stirring.

As the compound (Id) obtained by the above preparation method, there maybe mentioned, for example, the respective compounds comprising therespective kinds of substituted groups corresponding to Compounds Nos.244 to 246, 249 to 250, 268, 274 to 275, 282 to 287 and 305 (which arereferred to as Compounds 244 to 246, 249 to 250, 268, 274 to 275, 282 to287 and 305, respectively) shown in Table 1 (for example, the compound(Id) corresponding to Compound No. 244 is referred to as Compound 244,and this Compound 244 means a compound wherein R^(1') is CN, R² and R³are both CH₃, R^(4") is OCH₂ OCH₃, R⁵ and R^(6') are both OCH₃ in thecompound (Id)).

The herbicide containing the compound (I) as an active ingredient hashigh selectivity and also shows excellent herbicidal effect.

That is, the herbicide of the present invention shows excellentherbicidal effect on annual weeds and perennial weeds grown in paddyfields and upland fields, and its herbicidal effect is particularlyremarkable in annual grass weeds (e.g. crabgrass (manna-grass),barnyardgrass and foxtail (green panicum)), annual broad-leaved weeds(e.g. morning glory, common lambsquarter (white goose-foot), lividamaranthus and velvetleaf) and perennial weeds (e.g. Johnson grass,bulrush and flatstage).

The herbicide of the present invention shows excellent herbicidal effecton the weeds described above, but does not give chemical damage on fieldcrops (e.g. cotton) at a concentration for such a treatment.

The herbicide of the present invention contains the compound (I) as anactive ingredient(s).

The compound (I) can be used singly, but may be preferably used bymixing with a carrier, a surfactant, a dispersant and an auxiliary (forexample, prepared as a composition such as a dust, an emulsion, a finegranule, a granule, a wettable powder, an oily suspension and anaerosol) according to a conventional method.

As the carrier, there may be mentioned, for example, a solid carriersuch as talc, mica, bentonite, clay, kaolin, diatomaceous earth, whitecarbon, vermiculite, dolomite, zeolite, slaked lime, siliceous sand,silicic anhydride, ammonium sulfate, urea, wood powder, starch andcellulose; a liquid carrier such as hydrocarbons (kerosine and mineraloil), aromatic hydrocarbons (benzene, toluene and xylene), chlorinatedhydrocarbons (chloroform and carbon tetrachloride), ethers (dioxane andtetrahydrofuran), ketones (acetone, cyclohexanone and isophorone),esters (ethyl acetate, ethylene glycol acetate and dibutyl maleate),alcohols (methanol, n-hexanol and ethylene glycol), polar solvents(dimethylformamide and dimethylsulfoxide) and water; and a gas carriersuch as air, nitrogen, carbonic acid gas and freon (in the case of a gascarrier, mixed spray can be carried out).

As the surfactant which can be used for improving attachment of thepresent herbicide to and absorption thereof in plants, and improvingcharacteristics such as dispersion, emulsification and spreading of theherbicide, there may be mentioned nonionic, anionic, cationic oramphoteric surfactants (e.g. alcohol sulfates, alkysulfonates, ligninsulfonates and polyoxyethylene glycol ethers.) Further, for improvingproperties of preparation, carboxymethyl cellulose, polyethylene glycolor gum arabic can be used as an auxiliary.

In preparation of the present herbicide, in addition to the abovecarrier, surfactant, dispersant and auxiliary, other agriculturalchemicals (a fungicide and an insecticide), a fertilizer and a soilconditioner can be used singly or in a suitable combination,respectively, depending on the respective purposes.

When the compound (I) of the present invention is made intopreparations, the concentration of the active ingredient is generally 1to 50% by weight in an emulsion, generally 0.3 to 25% by weight in adust, generally 1 to 90% by weight in a wettable powder, generally 0.5to 5% by weight in a granule, generally 0.5 to 5% by weight in an oilydispersion, and generally 0.1 to 5% by weight in an aerosol.

These preparations can be provided for various uses by diluting them tohave a suitable concentration and spraying them to stems and/or leavesof plants, soil and paddy field surface, or by applying them directlythereto, depending on the respective purposes.

EXAMPLES

The present invention is described in detail by referring to Examples,but the scope of the present invention is not limited by these Examples.

Example 1 (1) Synthesis of1-(3-ethoxy-2-(4,6-dimethoxypyrimidin-2-yl)oxy-3-methylbutyryl)imidazole(Compound 12)

In 100 ml of methylene chloride was dissolved 19.4 g (0.12 mol) ofN,N-carbonyldiimidazole, and the mixture was maintained at 5° C. To themixture was added dropwise 30.0 g (0.1 mol) of3-ethoxy-2-(4,6-dimethoxypyrimidin-2-yl)oxy-3-methylbutanoic aciddissolved in 100 ml of an N,N-dimethylformamide (DMF) solution, and themixture was stirred at room temperature for 0.5 hour.

After completion of the stirring, the methylene chloride layer waswashed with water and dried over sodium sulfate, and methylene chloridewas removed under reduced pressure. The crystals obtained were washedwith n-hexane to obtain 29.8 g (yield: 85%) of the title compound aswhite crystals.

(2) Synthesis of1-(2-(4,6-dimethoxy-2-yl)thio-3-methoxy-3-methylbutyryl)imidazole(Compound 7)

In 150 ml of methylene chloride was dissolved 19.4 g (0.12 mol) ofN,N-carbonyldiimidazole, and the mixture was maintained at 5° C. To themixture was added dropwise 30.2 g (0.1 mol) of2-(4,6-dimethoxy-2yl)thio-3-methoxy-3-methylbutanoic acid dissolved in100 ml of a DMF solution, and the mixture was stirred at 5° C. for 1hour.

After completion of the stirring, the reaction mixture was added to 100ml of water and extracted with ethyl acetate. The ethyl acetate layerwas washed with a saturated saline solution and dried over sodiumsulfate, and ethyl acetate was removed under reduced pressure. Thecrystals obtained were washed with n-hexane to obtain 30.0 g (yield:85%) of the title compound as white crystals.

(3) Synthesis of2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methoxy-3-methyl-N-methylsulfonylbutanoicacid amide (Compound 47)

In 50 ml of N,N-dimethylformamide (DMF) was suspended sodium hydride(0.1 mol, 4 g in which 60% thereof was dissolved in oil), and to thesuspension was added dropwise 9.5 g (0.1 mol) of methanesulfonamidedissolved in 50 ml of a DMF solution. The mixture was stirred for 2hours. After completion of the stirring, 35.2 g (0.1 mol) of1-(2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methoxy-3-methylbutyryl)imidazoledissolved in 100 ml of DMF was added dropwise to the mixture. After acompletion of the dropwise addition, the mixture was stirred at roomtemperature for 1 hour.

To the reaction mixture were added water and 1N hydrochloric acid (300ml) and the mixture was extracted with ethyl acetate. The ethyl acetatelayer was washed with a saturated saline solution and dried over sodiumsulfate, and ethyl acetate was removed under reduced pressure. Theresidue obtained was isolated by column chromatography (Wako gel C-200,(trade name, manufactured by Wako Junyaku K. K.), eluted byn-hexane:ethyl acetate:methanol=1:1:0.1) to obtain 28.4 g (yield: 75%)of the title compound as white crystals.

(4) Synthesis of3-ethoxy-2-(4,6-dimethoxypyrimidin-2-yl)oxy-3-methyl-N-methylsulfonylbutanoicacid amide (Compound 67)

In 50 ml of N,N-dimethylformamide (DMF) was dissolved 19.4 g (0.12 mol)of carbonylidiimidazole, and the mixture was maintained at 5° C. To themixture was added dropwise 30 g (0.1 mol) of3-ethoxy-2-(4,6-dimethoxypyrimidin-2-yl)oxy-3-methylbutanoate dissolvedin 100 ml of a DMF solution. After completion of the dropwise addition,the mixture was stirred for 0.5 hour. To the mixture were added 9.5 g(0.1 mol) of methanesulfonamide and further sodium hydride (0.1 mol, 4 gin which 60% thereof was dissolved in oil) at 0° C. The mixture wasstirred for 1 hour.

To the reaction mixture were added water and 1N hydrochloric acid (300ml) and the mixture was extracted with ethyl acetate. The ethyl acetatelayer was washed with a saturated saline solution and dried over sodiumsulfate, and ethyl acetate was removed under reduced pressure. Theresidue obtained was isolated by column chromatography (Wako gel C-200,(trade name, manufactured by Wako Junyaku K. K.), eluted byn-hexane:ethyl acetate:methanol=1:1:0.1) to obtain 30.0 g (yield: 80%)of the title compound as white crystals.

(5) Synthesis of ethyl2-(4,6-dimethoxy-s-triazin-2-yl)oxy-3-ethoxy-3-methylbutanoate (Compound154)

The compound (Ic) of the present invention was synthesized according tothe method described in (Preparation method 3).

That is, in 40 ml of ethanol was dissolved 14.4 g (0.1 mol) of ethyl2,3-epoxy-3-methylbutanoate, and then 0.5 ml of sulfuric acid was addedthereto as a catalyst. The mixture was stirred at 30° C. for 2 hours.

Subsequently, excessive ethanol was removed under reduced pressure, andthe residue was applied to column chromatography (Wako gel C-200 (tradename, manufactured by Wako Junyaku K. K.), eluted by n-hexane:ethylacetate=7:3) to obtain ethyl 3-ethoxy-2-hydroxy-3-methylbutanoate. Thisproduct was added at 5° C. to 0.1 mol of sodium hydride (60% thereof wasdissolved in 4 g of oil) suspended in 100 ml of tetrahydrofuran, and themixture was stirred for 30 minutes. After completion of the stirring, tothe mixture was added dropwise 17.5 g (0.1 mol) of2-chloro-4,6-dimethoxy-s-triazine dissolved in 50 ml of tetrahydrofuran,and the mixture was stirred at 20° C. for 1 hour.

The reaction mixture was added to water and extracted with ethylacetate. The ethyl acetate layer was washed with a saturated salinesolution and dried over sodium sulfate, and ethyl acetate was removedunder reduced pressure. The residue obtained was isolated by columnchromatography (Wako gel C-200 (trade name, manufactured by Wako JunyakuK. K.), eluted by n-hexane:ethyl acetate=3:1) to obtain 26.3 g (yield:80%) of the title compound as a colorless oily product.

(6) Synthesis of benzyl2-(4,6-dimethoxy-s-triazin-2-yl)oxy-3-ethoxy-3-methylbutanoate (Compound155)

The title compound (Ic) was synthesized according to the methoddescribed in (Preparation method 5).

That is, in 200 ml of toluene were dissolved 32.9 g (0.1 mol) ofCompound 154 prepared in the above (5) and 16.2 g (0.15 mol) of benzylalcohol. To the solution was added 3 ml of titanium tetraisopropoxide asa catalyst. The mixture was refluxed by heating for 6 hours whileremoving ethanol liberated during reflux.

Subsequently, the reaction mixture was cooled to room temperature. Thetoluene layer was washed with water, and toluene was removed underreduced pressure. The residue obtained was isolated by columnchromatography (Wako gel C-200 (trade name, manufactured by Wako JunyakuK. K.), eluted by n-hexane:ethyl acetate=3:1) to obtain 33.3 g (yield:85%) of the title compound as a colorless oily product.

(7) Synthesis of2-(4,6-dimethoxy-s-triazin-2-yl)oxy-3-ethoxy-3-methylbutanoic acid(Compound 156)

The compound (Ic) of the present invention was synthesized according tothe method described in (Preparation method 6).

That is, in 200 ml of ethanol were dissolved 39.2 g (0.1 mol) ofCompound 155 prepared in the above, (6), and 0.5 g of palladium carbonwas added thereto as a catalyst. The mixture was stirred at roomtemperature (20° C.) for 1 hour while blowing hydrogen therein.Subsequently, the catalyst was removed by filtration, and the motherliquor was concentrated to obtain 28.6 g (yield: 95%) of the titlecompound as a colorless oily product.

(8) Synthesis of2-(4,6-dimethoxy-s-triazin-2-yl)thio-3-ethoxy-3-methylbutanoic acid(Compound 157)

The title compound (Ic) was synthesized according to the methoddescribed in (Preparation method 3).

That is, in 1N sodium hydroxide was dissolved 17.8 g (0.1 mol) of3-ethoxy-2-mercapto-3-methylbutanoic acid. To the solution was added asolution of 17.5 g (0.1 mol) of 2-chloro-4,6-dimethoxy-s-triazinedissolved in 100 ml of acetone, and the mixture was stirred at roomtemperature (20° C.) for 1 hour.

The reaction mixture was added to 100 ml of 5N hydrochloric acid aqueoussolution and extracted with ethyl acetate. The ethyl acetate layer waswashed with a saturated saline solution and dried over sodium sulfaste,and ethyl acetate was removed under reduced pressure. The residueobtained was isolated by column chromatography (Wako gel C-200 (tradename, manufactured by Wako Junyaku K.K.), eluted by n-hexane:ethylacetate:acetic acid=1:1:0.1) to obtain 23.7 g (yield: 75%) of the titlecompound as a colorless transparent oily product.

(9) Synthesis of2-(4,6-dimethoxy-s-triazin-2-yl)thio-3-methoxy-3-methylbutanoic acid(Compound 148)

The title compound (Ic) was synthesized according to the methoddescribed in (Preparation method 4).

That is, to 150 ml of N,N'-dimethylformamide were added 30.2 g (0.1 mol)of 3-methoxy-3-methyl-2-paratoluenesulfonyloxybutanoic acid and 17.3 g(0.1 mol) of 4,6-dimethoxy-2-mercapto-s-triazine, and further, 13.8 (0.1mol) of potassium carbonate was added thereto. The mixture was stirredat 50° C. for 2 hours.

The reaction mixture was added to water and extracted with ethylacetate. The ethyl acetate layer was washed with a saturated salinesolution and dried over sodium sulfate, and ethyl acetate was removedunder reduced pressure. The residue obtained was isolated by columnchromatography (Wako gel C-200 (trade name, manufactured by Wako JunyakuK. K.), eluted by n-hexane:ethyl acetate:acetic acid=1:1:0.1) to obtain24.2 g (yield: 80%) of the title compound as white crystals.

(10) Synthesis of ethyl2-(4,6-dimethoxypyrimidin-2-yl)thio-3-hydroxy-3-methylbutanoate(Compound (Ie)₁₈₁)

The title compound was synthesized according to the synthetic method ofCompound (Ie) described in (Preparation method 7).

That is, in 300 ml of tetrahydrofuran (THF) was dissolved 25.8 g (0.1mol) of ethyl (4,6-dimethoxypyrimidin-2-yl)thioacetate. To the solutionwas added dropwise 110 ml (0.11 mol) of a bis(trimethylsilyl)lithiumamide --1M THF solution at -78° C. under nitrogen gas stream, and then6.4 g (0.11 mol) of acetone was added thereto. The mixture was stirredfor 1 hour. Subsequently, the reaction mixture was elevated to atemperature of 0° C. The mixture was poured into water, and 500 ml ofethyl ether was added thereto. The ethyl ether layer was extracted,washed with water and dried. THF and ethyl ether was removed underreduced pressure, and the residue obtained was isolated by columnchromatography (Wako gel C-200 (trade name, manufactured by Wako JunyakuK. K.), eluted by n-hexane:ethyl acetate=5:1) to obtain 24.6 g (yield:78%) of the title compound as a colorless transparent viscous liquid.

Physical property: reflective index at 20° C. was 1.5230.

(11) Synthesis of ethyl3-chloro-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutanoate (Compound215)

The compound (Id) was synthesized according to (Preparation method 7).

That is, in 100 ml of ethyl ether was dissolved 16.8 g (53 mmol) ofCompound (Ie)₁₈₁ obtained in the above (10), and to the solution wasadded dropwise 6.5 g (55 mmol) of thionyl chloride at room temperature.The mixture was stirred for 1 hour. Subsequently, the reaction mixturewas poured into ice water and washed with water, and further washed withwater twice, followed by drying. Ethyl ether was removed under reducedpressure, and the residue obtained was isolated by column chromatography(Wako gel C-200 (trade name, manufactured by Wako Junyaku K. K.), elutedby n-hexane:ethyl acetate=8:1) to obtain 14.2 g (yield: 80%) of thetitle compound as white crystals.

(12) Synthesis of ethyl3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutanoate (Compound221)

The compound (Id) was synthesized according to (Preparation method 7).

That is, in 30 ml of DMF was dissolved 3.4 g (10 mmol) of Compound 215obtained in the above (11), and to the solution was added 12 mmol of asodium cyanide solution (a solution of 0.6 g of sodium cyanide dissolvedin 2 ml of water). The mixture was stirred at 60° C. for 3 hours.Subsequently, the reaction mixture was poured into water and extractedwith 100 ml of toluene. The toluene layer was washed with water 5 timesand dried, and toluene was removed under reduced pressure.

The oily product obtained was isolated by column chromatography (Wakogel C-200 (trade name, manufactured by Wako Junyaku K. K.), eluted byn-hexane:ethyl acetate=8:1) to obtain 2.1 g (yield: 65%) of the titlecompound as white crystals.

(13) Synthesis of3-cyano-2-(4,6-dimethoxypyrimidin-2yl)-thio-3-methylbutanoic acid(Compound 219)

The compound (Id) was synthesized according to (Preparation method 9).

That is, in 10 ml of acetone was dissolved 1.0 g (3 mmol) of Compound221 obtained in the above (12), and to the solution was added a sodiumhydroxide solution (a solution of 0.2 g of sodium hydroxide dissolved in10 ml of water). The mixture was stirred at room temperature for 5hours. Subsequently, the reaction mixture was poured into water,neutralized with a 1N hydrochloric acid solution and extracted withethyl ether. The ethyl ether layer was washed with water and dried, andethyl ether was removed under reduced pressure to obtain 0.7 g (yield:78%) of the title compound as white crystals.

(14) Synthesis of propyl3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutanoate (Compound222)

The compound (Id) was synthesized according to (Preparation method 10).

That is, in 30 ml of dried methylene chloride were dissolved 0.6 g (2mmol) of Compound 219 obtained in the above (13) and 0.2 g (3 mmol) ofpropanol, and to the solution was added 0.4 g (2 mmol) of WSC at 5° C.The mixture was stirred for 30 minutes. Subsequently, the reactionmixture was poured into water, washed with water and dried, andmethylene chloride was removed under reduced pressure.

The oily product obtained was isolated by column chromatography (Wakogel C-200 (trade name, manufactured by Wako Junyaku K. K.), eluted byn-hexane:ethyl acetate=8:1) to obtain 0.5 g (yield: 74%) of the titlecompound as white crystals.

(15) Synthesis of3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)-thio-3-methylbutyryl-1-imidazole(Compound 240)

The compound (Id) was synthesized according to (Preparation method 10).

That is, in 30 ml of dried methylene chloride was dissolved 1.0 g (3.4mmol) of Compound 219 obtained in the above (13). At room temperature,0.6 g (3.4 mmol) of carbonyldimidazole was added to the solution, andthe mixture was stirred for 30 minutes. Further, 5 ml of water was addedthereto, and the mixture was stirred for 5 minutes. Subsequently, fromthe reaction mixture, water was removed by using a filter paper forseparation, and methylene chloride was removed under reduced pressure toobtain 1.1 g (yield: 90%) of the title compound as pale brown crystals.

(16) Synthesis of3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3methyl-N-methylsulfonylbutanoicacid amide (Compound 241)

The compound (Id) was synthesized according to (Preparation method 10).

That is, in 20 ml of DMF were dissolved 0.8 g (2.2 mmol) of Compound 240obtained in the above (13) and 0.3 g (3 mmol) of methanesulfonamide, andto the solution was added 0.1 g (25 mmol) of sodium hydride at 5° C. Themixture was stirred at room temperature for 1 hour. Subsequently, thereaction mixture was poured into water, neutralized with a citric acidaqueous solution and extracted by 80 ml of chloroform. The chloroformlayer was washed with water 5 times and dried, and chloroform wasremoved under reduced pressure to obtain a semisolid material.

To the semisolid material was added 30 ml of hexane, and the mixture wasleft to stand. The crystals obtained were collected by filtration anddried to obtain 7.1 g (yield: 87%) of the title compound as whitecrystals.

(17) Synthesis of potassium3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutanoate (Compound245)

The compound (Id) was synthesized according to (Preparation method 11).

That is, in 20 ml of methanol was dissolved 0.23 g powdered potassiumhydroxide, and in the solution was dissolved 1.0 g (3.4 mmol) ofCompound 219 obtained in the above (13) dissolved in 20 ml of methanol.The mixture was stirred at room temperature for 30 minutes.Subsequently, methanol was removed under reduced pressure to obtain awhite solid material.

The solid material was added to 30 ml of toluene, and washedsufficiently. Toluene was removed by filtration, and the residue wasdried to obtain 1.0 g (yield: 98%) of the title compound as whitecrystals.

(18) Synthesis of (t-butylcarbonyloxymethyl)3-cyano-2-(4,6-dimethoxypyrimidin-2yl)thio-3-methylbutanoate (Compound246)

The compound (Id) was synthesized according to (Preparation method 11).

That is, in 50 ml of toluene were dissolved 1.0 g (3 mmol) of Compound245 obtained in the above (17), 0.5 g (3.3 mmol) of chloromethylpivalate, 1.0 g (6 mmol) of potassium iodide and 0.1 g of crown ether,and the mixture was refluxed by boiling for 5 hours. Subsequently, thereaction mixture was poured into water, washed with water and dried, andtoluene was removed under reduced pressure to obtain a pale yellow oilyproduct.

The oily product obtained was isolated by column chromatography (Wakogel C-200 (trade name, manufactured by Wako Junyaku K. K.), eluted byn-hexane:ethyl acetate=1:8 ) to obtain 0.9 g (yield: 73%) of a colorlesstransparent oily product.

(19) Syntheses of other compounds (I) in Table 1

In the same manner as in either of the synthetic methods (1) to (11),title compounds (I) as shown in Table 1 were obtained.

                                      TABLE 1                                     __________________________________________________________________________     ##STR34##                                                                    Compound                                                                      No.   R.sup.7      R.sup.3                                                                             X    Z     Physical property                         __________________________________________________________________________     1    CH.sub.3     H     O    CH                                               2    "            "     "    N                                                3    "            "     S    CH                                               4    "            "     "    N                                                5    "            CH.sub.3                                                                            O    CH    m.p. 129˜131° C.              6    "            "     "    N     m.p. 93˜95° C.                7    "            "     S    CH    m.p. 114˜118° C.              8    "            "     "    N     m.p. 74˜76° C.                9    C.sub.2 H.sub.5                                                                            H     O    CH                                              10    "            "     S    "     n.sub.D.sup.24.0 1.5298                   11    "            "     "    N     m.p. 113˜116° C.             12    "            CH.sub.3                                                                            O    CH    m.p. 84˜88° C.               13    "            "     "    N                                               14    "            "     S    CH    n.sub.D.sup.19.2 1.5411                   15    C.sub.2 H.sub.5                                                                            CH.sub.3                                                                            S    N     m.p. 87˜89° C.               16    n-C.sub.3 H.sub.7                                                                          "     O    CH    m.p. 98˜99° C.               17    "            "     S    "                                               18    "            "     "    N                                               19    CH.sub.2 CHCH.sub.2                                                                        H     O    CH    m.p. 112˜113° C.             20    "            "     S    "                                               21    "            "     "    N                                               22    "            CH.sub.3                                                                            O    CH    m.p. 102˜103° C.             23    "            "     S    "     m.p. 99˜100° C.              24    "            "     "    N     m.p. 97˜98° C.               25    HCCCH.sub.2  H     O    CH    m.p. 98˜100° C.              26    "            "     S    "     n.sub.D.sup.25.6 1.5194                   27    "            "     "    N                                               28    "            CH.sub.3                                                                            O    CH    m.p. 90˜92° C.               29    "            "     S    "     m.p. 69˜70° C.               30    "            "     "    N     m.p. 83˜85° C.               31    ClCH.sub.2 CH.sub.2                                                                        "     O    CH    m.p. 96˜97° C.               32    ClCH.sub.2 CH.sub.2                                                                        CH.sub.3                                                                            O    N     m.p. 103˜105° C.             33    "            "     S    CH    m.p. 83˜84° C.               34    "            "     "    N                                               35    CNCH.sub.2 CH.sub.2                                                                        "     O    CH                                              36    "            "     "    N                                               37    "            "     S    CH                                              38    "            "     "    N                                               __________________________________________________________________________     ##STR35##                                                                    Compound                               Physical                               No.   R.sup.7    R.sup.3                                                                           R.sup.8    X  Z   property                               __________________________________________________________________________    39    CH.sub.3   H   CH.sub.3   O  CH                                         40    "          "   "          "  N                                          41    "          "   "          S  CH  m.p. 123˜126° C.          42    "          "   "          "  N                                          43    "          "   C.sub.2 H.sub.5                                                                          O  CH                                         44    "          "   "          S  "                                          45    CH.sub.3   CH.sub.3                                                                          CH.sub.3   O  CH  m.p. 126˜127° C.          46    "          "   "          "  N   n.sub.D.sup.23.8 1.4933                47    "          "   "          S  CH  m.p. 97˜98° C.            48    "          "   "          "  N   m.p. 98˜101° C.           49    "          "   C.sub.2 H.sub.5                                                                          O  CH  m.p. 103˜105° C.          50    "          "   "          S  "   m.p. 73˜75° C.            51    "          "   "          "  N   oily product                           52    "          "   n-C.sub.3 H.sub.7                                                                        O  CH                                         53    "          "   "          S  "   n.sub.D.sup.24.9 1.5334                54    "          "   i-C.sub.3 H.sub.7                                                                        O  "                                          55    "          "   "          S  "   n.sub.D.sup.23.7 1.3310                56    "          "   n-C.sub.4 H.sub.9                                                                        O  "                                          57    "          "   "          S  "   n.sub.D.sup.25.8 1.5243                58    "          "                                                                                  ##STR36## O  "                                          59    "          "                                                                                  ##STR37## "  "                                          60    "          "                                                                                  ##STR38## "  "                                          61    C.sub.2 H.sub.5                                                                          H   CH.sub.3   "  "   m.p. 112˜116° C.          62    "          "   "          S  "   n.sub.D.sup.23.2 1.5324                63    C.sub.2 H.sub.5                                                                          H   CH.sub.3   S  N   n.sub.D.sup.23.7 1.5056                64    "          "   C.sub.2 H.sub.5                                                                          O  CH  n.sub.D.sup.23.4 1.5028                65    "          "   "          S  "   n.sub.D.sup.26.0 1.5266                66    "          "   "          "  N                                          67    "          CH.sub.3                                                                          CH.sub.3   O  CH  m.p. 58˜60° C.            68    "          "   "          S  "   n.sub.D.sup.21.8 1.5253                69    "          "   "          "  N   Oily product                           70    "          "   C.sub.2 H.sub.5                                                                          O  CH  m.p. 59˜62° C.            71    "          "   n-C.sub.3 H.sub.7                                                                        "  "   m.p. 79˜81° C.            72    "          "   i-C.sub.3 H.sub.7                                                                        "  "   m.p. 117˜118° C.          73    "          "   n-C.sub.4 H.sub.9                                                                        "  "   m.p. 72˜74° C.            74    "          "                                                                                  ##STR39## "  "   m.p. 120˜121° C.          75    "          "                                                                                  ##STR40## "  "   Oily product                           76    n-C.sub.3 H.sub.7                                                                        "   CH.sub.3   "  "   m.p. 58˜59° C.            77    "          "   "          S  "   m.p. 104˜106° C.          78    "          "   "          "  N   m.p. 110˜112° C.          79    i-C.sub.3 H.sub.7                                                                        H   CH.sub.3   O  CH                                         80    CH.sub.2 CHCH.sub.2                                                                      "   "          "  "   m.p. 122˜125° C.          81    "          "   "          S  "   m.p. 98˜101° C.           82    "          "   "          "  N                                          83    "          CH.sub.3                                                                          "          O  CH  m.p. 60˜61° C.            84    "          "   "          S  "   n.sub.D.sup.24.0 1.5342                85    "          "   "          "  N   n.sub.D.sup.22.6 1.5332                86    HCCCH.sub.2                                                                              H   "          O  CH  m.p. 128˜131° C.          87    "          "   "          S  "                                          88    "          "   "          "  N                                          89    "          CH.sub.3                                                                          "          O  CH  m.p. 62˜65° C.            90    "          "   "          S  "   m.p. 131˜134° C.          91    "          "   "          "  N                                          92    ClCH.sub.2 CH.sub.2                                                                      "   "          O  CH  m.p. 93˜94° C.            93    "          "   "          S  "   n.sub.D.sup.22.6 1.5451                94    "          "   "          O  N   n.sub.D.sup.21.6 1.4916                95    "          "   "          S  "   oily product                           96    CNCH.sub.2 CH.sub.2                                                                      "   "          O  CH  m.p. 155˜158° C.          97    CNCH.sub.2 CH.sub.2                                                                      CH.sub.3                                                                          CH.sub.3   S  CH                                         98    "          "   "          "  N                                          99    CH.sub.3   "   n-C.sub.3 H.sub.7                                                                        "  "   n.sub.D.sup.24.9 1.5178                100   "          "   i-C.sub.3 H.sub.7                                                                        "  "   n.sub.D.sup.24.6 1.5190                101   "          "   n-C.sub.4 H.sub.9                                                                        "  "   n.sub.D.sup.24.6 1.5140                102   "          "                                                                                  ##STR41## "  CH  n.sub.D.sup.25.5 1.5470                103   "          "   "          "  N   m.p. 47˜50° C.            104   "          "                                                                                  ##STR42## "  CH  m.p. 131˜135° C.          105   "          "   "          "  N   oily product                           106   "          "                                                                                  ##STR43## "  CH  m.p. 49˜52° C.            107   "          "   "          "  N   m.p. 51˜54° C.            108   "          "                                                                                  ##STR44## "  CH  m.p. 89˜93° C.            109   "          "   "          "  N   m.p. 68˜72° C.            110   "          "                                                                                  ##STR45## "  CH  m.p. 44˜49° C.            111   "          "   "          "  N   m.p. 38˜41° C.            112   "          "                                                                                  ##STR46## "  CH  m.p. 42˜46° C.            113   "          "   "          "  N   n.sub.D.sup.24.6 1.5450                114   CH.sub.3   CH.sub.3                                                                           ##STR47## S  CH  m.p. 53˜57° C.            115   "          "   "          "  N   m.p. 46˜52° C.            116   C.sub.2 H.sub.5                                                                          "   C.sub.2 H.sub.5                                                                          "  "   n.sub.D.sup.24.0 1.5244                117   "          "   n-C.sub.3 H.sub.7                                                                        "  "   n.sub.D.sup.24.3 1.5210                118   "          "   i-C.sub.3 H.sub.7                                                                        "  CH  m.p. 87˜90° C.            119   "          "   "          "  N   n.sub.D.sup.23.5 1.5220                120   "          "   n-C.sub.4 H.sub.9                                                                        "  "   n.sub.D.sup.23.6 1.5190                121   "          "                                                                                  ##STR48## "  CH  n.sub.D.sup.19.8 1.5438                122   "          "   "          "  N   m.p. 46˜49° C.            123   n-C.sub.3 H.sub.7                                                                        "   C.sub.2 H.sub.5                                                                          "  CH  m.p. 88˜90° C.            124   "          "   "          "  N   n.sub.D.sup.18.5 1.5112                125   "          "   i-C.sub.3 H.sub.7                                                                        "  CH  oily product                           126   "          "   "          "  N   oily product                           127   i-C.sub.3 H.sub.7                                                                        "   CH.sub.3   O  CH  m.p. 104˜105° C.          128   "          "   "          S  "   m.p. 112˜115° C.          129   HCCCH.sub.2                                                                              "   C.sub.2 H.sub.5                                                                          O  "   m.p. 111˜112° C.          130   "          "   "          S  "   m.p. 126˜128° C.          131   HCCCH.sub.2                                                                              CH.sub.3                                                                          C.sub.2 H.sub.5                                                                          S  N   oily product                           132   "          "   n-C.sub.3 H.sub.7                                                                        O  CH  m.p. 111˜113° C.          133   "          "   "          S  N   oily product                           134   FCH.sub.2 CH.sub.2                                                                       "   CH.sub.3   O  CH  m.p. 112˜114° C.          135   "          "   "          S  "   oily product                           136   F.sub.2 CHCH.sub.2                                                                       "   "          O  "   "                                      137   "          "   C.sub.2 H.sub.5                                                                          "  "   "                                      138   ClCH.sub.2 CH.sub.2                                                                      "   "          "  "   m.p. 92˜93° C.            139   CNCH.sub.2 CH.sub.2                                                                      "   "          "  "   n.sub.D.sup.20.6 1.5054                140   "          "   n-C.sub.3 H.sub.7                                                                        "  "   oily product                           __________________________________________________________________________     ##STR49##                                                                    Compound                                                                      No.   R.sup.7    R.sup.2                                                                           R.sup.4'   R.sup.6                                                                            X  Physical property                     __________________________________________________________________________    141   CH.sub.3   H   OC.sub.2 H.sub.5                                                                         OCH.sub.3                                                                          O                                        142   "          "                                                                                  ##STR50## "    "                                        143   "          "   OH         "    "                                        144   CH.sub.3   H   OH         OCH.sub.3                                                                          S  m.p. 111˜115° C.         145   "          CH.sub.3                                                                          OC.sub.2 H.sub.5                                                                         "    O                                        146   "          "                                                                                  ##STR51## "    "                                        147   "          "   OH         "    "  m.p. 94˜96° C.           148   "          "   "          "    S  m.p. 117˜118° C.         149   "          "   "          CH.sub.3                                                                           "  m.p. 121˜124° C.         150   C.sub.2 H.sub.5                                                                          H   OC.sub.2 H.sub.5                                                                         OCH.sub.3                                                                          O  oily product                          151   "          "                                                                                  ##STR52## "    "  m.p. 60˜65° C.           152   "          "   OH         "    "  n.sub.D.sup.22.8 1.4790               153   "          "   "          "    S  n.sub.D.sup.19.6 1.5186               154   "          CH.sub.3                                                                          OC.sub.2 H.sub.5                                                                         "    O  n.sub.D.sup.22.4 1.4757               155   "          "                                                                                  ##STR53## "    "  m.p. 83˜85° C.           156   "          "   OH         "    "  n.sub.D.sup.22.4 1.4784               157   "          "   "          OCH.sub.3                                                                          S  n.sub.D.sup.25.6 1.5118               158   "          "   "          CH.sub.3                                                                           "                                        159   n-C.sub.3 H.sub.7                                                                        "   OC.sub.2 H.sub.5                                                                         OCH.sub.3                                                                          O  oily product                          160   "          "                                                                                  ##STR54## "    "  n.sub.D.sup.20.8 1.5152               161   n-C.sub.3 H.sub.7                                                                        CH.sub.3                                                                          OH         OCH.sub.3                                                                          O  n.sub.D.sup.25.0 1.4873               162   "          "   "          "    S  n.sub.D.sup.23.1 1.5044               163   i-C.sub.3 H.sub.7                                                                        H   OC.sub.2 H.sub.5                                                                         "    O                                        164   CH.sub.2 CHCH.sub.2                                                                      "   OH         "    S                                        165   "          CH.sub.3                                                                          OC.sub.2 H.sub.5                                                                         "    O  n.sub.D.sup.22.3 1.4840               166   "          "                                                                                  ##STR55## "    "                                        167   "          "   OH         "    S  n.sub.D.sup.21.8 1.5354               168   HCCCH.sub.2                                                                              H   "          "    "                                        169   "          CH.sub.3                                                                          OC.sub.2 H.sub.5                                                                         "    O  n.sub.D.sup.23.0 1.4851               170   "          "                                                                                  ##STR56## "    "  n.sub.D.sup.22.8 1.5316               171   "          "   OH         "    S  oily product                          172   ClCH.sub.2 CH.sub.2                                                                      "   OC.sub.2 H.sub.5                                                                         "    O  m.p. 81˜83° C.           173   "          "                                                                                  ##STR57## "    "  oily product                          174   "          "   OH         "    "  m.p. 87˜88° C.           175   "          "   "          "    S  m.p. 95˜96° C.           176   BrCH.sub.2 CH.sub.2                                                                      "   OC.sub.2 H.sub.5                                                                         "    O  oily product                          177   "          "                                                                                  ##STR58## "    "  m.p. 73˜76° C.           178   BrCH.sub.2 CH.sub.2                                                                      CH.sub.3                                                                          OH         OCH.sub.3                                                                          O                                        179   "          "   "          "    S                                        180   CNCH.sub.2 CH.sub.2                                                                      "   "          "    "  m.p. 98˜101°             __________________________________________________________________________                                            C.                                     ##STR59##                                                                    Compound                                                                      No.   R.sup.2                                                                              R.sup.3                                                                           R.sup.5                                                                            R.sup.6'                                                                          R.sup.4"     Physical property                      __________________________________________________________________________    181   CH.sub.3                                                                             CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                         OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.5230                182   "      C.sub.2 H.sub.5                                                                   "    "   "            n.sub.D.sup.20.0 1.4931                183   "      CH.sub.3                                                                          "    "   NHSO.sub.2 CH.sub.3                                                                        m.p. 113˜114° C.          184   "      "   "    "   NHSO.sub.2 C.sub.2 H.sub.5                          185   "      "   "    "   NHSO.sub.2 C.sub.3 H.sub.7 -n                                                              m.p. 117˜118° C.          186   "      "   "    "   NHSO.sub.2 C.sub.3 H.sub.7 -i                       187   "      "   "    "   NHSO.sub.2 C.sub.4 H.sub.9 -n                                                              m.p. 102˜104° C.          188   "      "   "    "   NHSO.sub.2 C.sub.4 H.sub.9 -sec                     189   "      "   "    "   NHSO.sub.2 C.sub.4 H.sub.9 -i                       190   "      "   "    "   NHSO.sub.2 C.sub.5 H.sub.11 -n                                                             m.p. 81˜83° C.            191   CH.sub.3                                                                             CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                         NHSO.sub.2 C.sub.6 H.sub.13 -n                                                             m.p. 74˜75° C.            192   "      "   "    "                                                                                  ##STR60##                                          193   "      "   "    "                                                                                  ##STR61##                                          194   "      "   "    "                                                                                  ##STR62##                                          195   "      "   "    "   NHSO.sub.2 CH(CH.sub.3)C.sub.2 H.sub.5              __________________________________________________________________________     ##STR63##                                                                    Compound                                                                      No.   R.sup.2                                                                              R.sup.3                                                                          R.sup.1                                                                          R.sup.5                                                                           R.sup.6                                                                           R.sup.4      Physical property                     __________________________________________________________________________    196   CH.sub.3                                                                             CH.sub.3                                                                         F  OCH.sub.3                                                                         OCH.sub.3                                                                         OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.5092               197   "      "  "  "   "   OH           m.p. 109˜110° C.         198   "      "  "  "   "                                                                                  ##STR64##   n.sub.D.sup.20.0 1.5326               199   "      "  "  "   "   NHSO.sub.2 CH.sub.3                                                                        m.p. 147° C.                   200   "      "  "  "   "   NHSO.sub.2 C.sub.2 H.sub.5                                                                 m.p. 129˜130° C.         201   "      "  "  "   "   NHSO.sub.2 C.sub.3 H.sub.7 -n                                                              m.p. 103° C.                   202   "      "  "  "   "   NHSO.sub.2 C.sub.3 H.sub.7 -i                                                              m.p. 118° C.                   203   CH.sub.3                                                                             CH.sub.3                                                                         F  OCH.sub.3                                                                         OCH.sub.3                                                                         NHSO.sub.2 C.sub.4 H.sub.9 -n                                                              m.p. 98° C.                    204   "      "  "  "   "                                                                                  ##STR65##   n.sub.D.sup.20.0 1.5602               205   CF.sub.3                                                                             "  "  "   "   OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.4956               206                                                                                  ##STR66##                                                                           H  "  "   "   "            n.sub.D.sup.20.0 1.5735               207                                                                                  ##STR67##                                                                           "  "  "   "   "            n.sub.D.sup.20.0 1.4925               208   CH.sub.3                                                                             CH.sub.3                                                                         "  "   "   NHSO.sub.2 C.sub.5 H.sub.11 -n                                                             m.p. 105˜106°  C.        209   "      "  "  "   "   NHSO.sub.2 C.sub.6 H.sub.13 -n                                                             m.p. 78˜79° C.           210   "      "  "  "   "                                                                                  ##STR68##   m.p. 131˜134° C.         211   "      "  "  "   "                                                                                  ##STR69##   m.p. 105˜106° C.         212   "      "  "  "   "                                                                                  ##STR70##   m.p. 101˜103° C.         213   "      "  "  "   "   NHSO.sub.2 C.sub.4 H.sub.9 -i                                                              m.p. 88-90° C.                 214   "      "  "  "   "                                                                                  ##STR71##   m.p. 102˜104° C.         215   "      "  Cl "   "   OC.sub.2 H.sub.5                                                                           m.p. 47˜48° C.           216   "      "  "  "   "                                                                                  ##STR72##   n.sub.D.sup.20.0 1.5570               217   "      "  "  "   "   OC.sub.2 H.sub.4 Si(CH.sub.3).sub.3                                                        n.sub.D.sup.20.0 1.5131               218   C.sub.2 H.sub.5                                                                      "  "  "   "   OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.4984               219   CH.sub.3                                                                             CH.sub.3                                                                         CN OCH.sub.3                                                                         OCH.sub.3                                                                         OH           m.p. 104˜106° C.         220   "      "  "  "   "   OCH.sub.3    m.p. 100˜101° C.         221   "      "  "  "   "   OC.sub.2 H.sub.5                                                                           m.p. 65˜66° C.           222   "      "  "  "   "   OC.sub.3 H.sub.7 -n                                                                        m.p. 63˜64° C.           223   "      "  "  "   "   OC.sub.3 H.sub.7 -i                                                                        m.p. 67˜68° C.           224   "      "  "  "   "   OCH.sub.2 CHCH.sub.2                                                                       n.sub.D.sup.20.0 1.5268               225   "      "  "  "   "   OCH.sub.2 CCH                                                                              n.sub.D.sup.20.0  1.5243              226   "      "  "  "   "   OC.sub.4 H.sub.9 -n                                                                        n.sub.D.sup.20.0 1.5164               227   "      "  "  "   "   OC.sub.4 H.sub.9 -i                                228   "      "  "  "   "   OC.sub.4 H.sub.9 -s                                229   "      "  "  "   "   OC.sub.4 H.sub.9 -t                                                                        m.p. 89˜90° C.           230   "      "  "  "   "   OC.sub.5 H.sub.9 -cyclo                                                                    n.sub.D.sup.20.0 1.5206               231   "      "  "  "   "   OC.sub.6 H.sub.11 -cyclo                           232   "      "  "  "   "   O(2-Cl)      n.sub.D.sup.20.0 1.5178                                          C.sub.6 H.sub.10 -cyclo                            233   "      "  "  "   "                                                                                  ##STR73##   n.sub.D.sup.20.0 1.5457               234   "      "  "  "   "                                                                                  ##STR74##   n.sub.D.sup.20.0 1.5367               235   "      "  "  "   "   OC.sub.2 H.sub.4                                                                           m.p. 88˜89° C.                                      Si(CH.sub.3).sub.3                                 236   "      "  "  "   "   SCH.sub.3                                          237   CH.sub.3                                                                             CH.sub.3                                                                         CN OCH.sub.3                                                                         OCH.sub.3                                                                         SC.sub.2 H.sub.5                                                                           m.p. 81˜83° C.           238   "      "  "  "   "   SC.sub.3 H.sub.7 -n                                239   "      "  "  "   "                                                                                  ##STR75##   m.p. 133˜135° C.         240   "      "  "  "   "                                                                                  ##STR76##   m.p. 122˜124° C.         241   "      "  "  "   "   NHSO.sub.2 CH.sub.3                                                                        m.p. 162˜163° C.         242   "      "  "  "   "   NHSO.sub.2 C.sub.2 H.sub.5                                                                 m.p. 153˜154° C.         243   "      "  "  "   "                                                                                  ##STR77##   m.p. 151˜153° C.         244   "      "  "  "   "   OCH.sub.2 OCH.sub.3                                                                        n.sub.D.sup.20.0 1.5204               245   "      "  "  "   "   OK           m.p. 88˜90° C.           246   "      "  "  "   "   OCH.sub.2 OCOC(CH.sub.3).sub.3                                                             n.sub.D.sup.20.0 1.5049               247   "      "  "  "   "   OCH.sub.2 CF.sub.3                                                                         n.sub.D.sup.20.0 1.5001               248   "      "  "  "   "   OCH.sub.2 C.sub.3 H.sub.5 0-cyclo                                                          m.p. 54˜55° C.           249   "      "  "  "   "   OC.sub.2 H.sub.4 OCH.sub.3                                                                 n.sub.D.sup.20.0 1.5133               250   "      "  "  "   "   OC.sub.2 H.sub.4 OC.sub.2 H.sub.5                                                          n.sub.D.sup.20.0 1.5100               251   "      "  "  "   "   OCH.sub.2 CH.sub.2 Cl                                                                      n.sub.D.sup.20.0 1.5266               252   C.sub.2 H.sub.5                                                                      "  "  "   "   OH           n.sub.D.sup.20.0 1.5407               253   "      "  "  "   "   OCH.sub.3    m.p. 98˜99° C.           254   "      "  "  "   "   OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.5094               255   C.sub.2 H.sub.5                                                                      CH.sub.3                                                                         CN OCH.sub.3                                                                         OCH.sub.3                                                                         NHSO.sub.2 CH.sub.3                                256   "      "  "  "   "   SC.sub.2 H.sub.5                                   257   "      "  "  "   "   OCH.sub.2 CCH                                                                              n.sub.D.sup.20.0 1.5270               258   "      "  "  "   "   OCH.sub.2 CHCH.sub.2                                                                       n.sub.D.sup.20.0 1.5218               259   "      "  "  "   "   OCH.sub.2 OCOC(CH.sub.3).sub.3                     260   CH.sub.3                                                                             H  "  "   "   OH                                                 261   "      "  "  "   "   OCH.sub.3                                          262   "      "  "  "   "   OC.sub.2 H.sub.5                                   263   "      "  "  "   "   SC.sub.2 H.sub.5                                   264   "      "  "  "   "   NHSO.sub.2 CH.sub.3                                265   C.sub.2 H.sub.5                                                                      CH.sub.3                                                                         "  "   "   OCH.sub. 2 CF.sub.3                                                                        n.sub.D.sup.20.0 1.4912               266   "      C.sub.2 H.sub.5                                                                  "  "   "   OC.sub.2 H.sub.5                                                                           m.p. 65˜66° C.           267   C.sub.3 H.sub.7 -n                                                                   CH.sub.3                                                                         "  "   "   "            n.sub.D.sup.20.0 1.5084               268   C.sub.2 H.sub.5                                                                      "  "  "   "   OCH.sub.2 OCH.sub.3                                                                        n.sub.D.sup.20.0 1.5171               269                                                                                  ##STR78##                                                                           "  "  "   "   OC.sub.2 H.sub.5                                                                           n.sub.D.sup.20.0 1.5531               270   H      H  "  "   "   "            n.sub.D.sup.20.0 1.5337               271   C.sub.3 H.sub.7 -i                                                                   CH.sub.3                                                                         "  "   "   "            n.sub.D.sup.20.0 1.3476               272   CH.sub.3                                                                             "  "  "   "   OCH.sub.2 CF.sub.3                                                                         n.sub.D.sup.20.0 1.5001               273   "      "  "  "   "                                                                                  ##STR79##   m.p. 54˜55° C.           274   CH.sub.3                                                                             CH.sub.3                                                                         CN OCH.sub.3                                                                         OCH.sub.3                                                                         OC.sub.2 H.sub.4 OC.sub.2 H.sub.                                                           n.sub.D.sup.20.0 1.5100               275   "      "  "  "   "   OC.sub.2 H.sub.4 OCH.sub.3                                                                 n.sub.D.sup.20.0 1.5133               276   "      "  "  "   "   OCH.sub.2 CHF.sub.2                                                                        m.p. 99˜100° C.          277   "      "  "  "   "   OCH(CF.sub.3).sub.2                                                                        m.p. 77˜79° C.           278   "      "  "  "   "   OCH(CF.sub.3)C.sub.2 F.sub.5                                                               n.sub.D.sup.20.0 1.4700               279   "      "  "  "   "   OCH.sub.2 CH.sub.2 F                                                                       m.p. 75˜76° C.           280   "      "  "  "   "   OCH(CH.sub.2 F).sub.2                                                                      m.p. 77˜78° C.           281   "      "  "  "   "   OCH.sub.2 CF.sub.2 CF.sub.3                                                                n.sub.D.sup.20.0 1.4742               282   "      "  "  "   "   OCH.sub.2 OC.sub.2 H.sub.4 OCH.sub.3                                                       n.sub.D.sup.20.0 1.5172               283   "      "  "  "   "   OCH.sub.2 SCH.sub.3                                                                        n.sub.D.sup.20.0 1.5242               284   "      "  "  "   "   OCH.sub.2 CN n.sub.D.sup.20.0 1.5253               285   "      "  "  "   "                                                                                  ##STR80##   n.sub.D.sup.20.0 1.5340               286   "      "  "  "   "   ONC(CH.sub.3).sub.2                                                                        n.sub.D.sup.20.0 1.5282               287   "      "  "  "   "   OCH.sub.2 OC.sub.2 H.sub.5                                                                 n.sub.D.sup.20.0 1.5076               288   "      "  "  "   "                                                                                  ##STR81##   n.sub.D.sup.20.0 1.5466               289   "      "  "  "   "                                                                                  ##STR82##   n.sub.D.sup.20.0 1.5446               290   "      "  "  "   "   OCH(CH.sub.3)CHCH.sub.2                                                                    n.sub.D.sup.20.0 1.5176               291   "      "  "  "   "   OCH.sub.2 CCCH.sub.3                                                                       n.sub.D.sup.20.0 1.5320               292   CH.sub.3                                                                             CH.sub.3                                                                         CN OCH.sub.3                                                                         OCH.sub.3                                                                         OCH.sub.2 CH.sub.2 CCH                                                                     n.sub.D.sup.20.0 1.5264               293   "      "  "  "   "   OCH(CH.sub.3)CCH                                                                           n.sub.D.sup.20.0 1.5247               294   "      "  "  "   "                                                                                  ##STR83##   n.sub.D.sup.20.0 1.5502               295   "      "  "  "   "                                                                                  ##STR84##   n.sub.D.sup.20.0 1.5488               296   "      "  "  "   "                                                                                  ##STR85##   n.sub.D.sup.20.0 1.5492               297   "      "  "  "   "                                                                                  ##STR86##   n.sub.D.sup.20.0 1.4008               298   "      "  "  "   "                                                                                  ##STR87##   n.sub.D.sup.20.0 1.3994               299   "      "  "  "   "                                                                                  ##STR88##   n.sub.D.sup.20.0 1.5524               300   "      "  "  "   "                                                                                  ##STR89##   n.sub.D.sup.20.0 1.5149               301   "      "  "  "   "                                                                                  ##STR90##   n.sub.D.sup.20.0 1.5569               302   "      "  "  "   "                                                                                  ##STR91##   n.sub.D.sup.20.0 1.5382               303   "      "  "  "   "                                                                                  ##STR92##   n.sub.D.sup.20.0 1.4770               304   "      "  "  "   "                                                                                  ##STR93##   n.sub.D.sup.20.0 1.5720               305   "      "  "  "   "   OCH(COOC.sub.2 H.sub.5).sub.2                                                              n.sub.D.sup.20.0 1.3534               306   CF.sub.3                                                                             "  "  "   "   OC.sub.2 H.sub.5                                                                           m.p. 82˜84° C.           __________________________________________________________________________

Example 2 (1) Preparation of granule

8 parts by weight of Compound 5 was uniformly mixed with 30 parts byweight of bentonite, 59 parts by weight of talc, 1 part by weight ofNeopelex powder (trade name, produced by Kao K. K) and 2 parts by weightof sodium lignosulfonate, and then the mixture was kneaded with additionof a small amount of water, followed by granulation and drying, toobtain a granule.

(2) Preparation of wettable powder

50 parts by weight of Compound 7 was uniformly mixed with 46 parts byweight of kaolin, 2 parts by weight of Neopelex powder (trade name,produced by Kao K. K.) and 2 parts by weight of Demol N (trade name,produced by Kao K. K.), and then the mixture was pulverized to obtain awettable powder.

(3) Preparation of emulsion

30 parts by weight of Compound 12 was added to 60 parts by weight ofxylene, 5 parts by weight of dimethylformamide and 5 parts by weight ofSorpol 3005X (trade name, produced by Toho Kagaku Kogyo) and uniformlymixed to be dissolved therein to obtain an emulsion.

(4) Preparation of dust

5 parts by weight of Compound 24 was uniformly mixed with 50 parts byweight of talc and 45 parts by weight of clay to obtain a dust.

Example 3 (1) Herbicidal test for paddy field

Wagner pots, each having an area of 1/5000 are, were packed with Ubesoil (alluvial soil) and planted with seeds or tubers of weeds(barnyardgrass, bulrush and flatstage). Then, the pots were filled withwater to a depth of 3 cm.

Each wettable powder of the desired compounds (I) shown in Table 1prepared in accordance with Example 2 was diluted with water andsubjected to dropwise addition treatment by using pipet so that aneffective concentration of the compound (I) in each herbicide became 20g/are at 1 leaf stage of barnyardgrass. These plants were investigated.As a comparative compound, Compound No. 155 disclosed in JapanesePerovisional Patent Publication No. 85262/1990 represented by thefollowing formula (XIII): ##STR94## prepared in the same manner asdescribed above was used.

The herbicidal effects were evaluated according to the 6 ranks (0: Non(normal development), 1: Less damaged, 2: Slightly damaged and 5: Allkilled) as compared with non-treated district.

The results are shown in Table 2.

                  TABLE 2                                                         ______________________________________                                        Kind of weed             Kind of weed                                               Barn-                      Barn-                                        Com-  yard-   Bul-    Flat-                                                                              Com-  yard- Bul-  Flat-                            pound grass   rush    stage                                                                              pound grass rush  stage                            ______________________________________                                        5     5       5       4     76   4     5                                      7     5       5       5     77   5     5     5                                12    5       5       5     81   5     5     5                                14    5       5       5     83   5     5     3                                15    5       5       3     84   5     5     5                                16    5       5       3     89   5     5     2                                22    5       5       4     90   5     5     5                                23    5       5       5     92   5     5     5                                28    5       5       3     93   5     5     2                                29    5       5       5     94         3                                      41    5       5       5     95   4     4                                      45    5       5       4     96   2     4                                      46    4       3             99   5     5     3                                47    5       5       5    100   5     5     4                                48    5       4            101         5     3                                49    3       5       4    104   2     5     4                                50    5       5       5    108   2     4     3                                51    3       2       2    110   4     5     3                                53    5       5       4    112   4     5     3                                55    5       5       4    114   2     5     2                                57    5       5       4    116   5     5     3                                63            5            117   3     5     2                                65    5       5       3    118   5     5     5                                67    5       4            119   4     5     2                                68    5       5       5    123   5     5     5                                69    5       5       4    125   5     5     3                                70    4       5            128   4     5     3                                72    5       5       2    130   5     5     5                                73    5       5       2    131   4     5     3                                134   5       5       3    267   5     5                                      135   5       5       3    268   5     5     3                                136   4       5       3    269                                                138   4       5       3    270         5                                      144   3       3       3    271   5     4     2                                147   4       5       0    272   5     5     5                                148   5       5       4    273   5     5     3                                156   5       5       4    274   5     5     2                                157   5       5       3    275   5     5     3                                196   5       5       4    276   5     5     4                                197   5       5       5    277   5     5     4                                198   4       3            278   5     5     4                                199           5       5    279   5     5     4                                204                        280   5     5     5                                205   2       5            281   5     5     4                                206   3       5       2    282   5     5     5                                207           5            283   5     5     2                                219   5       5       4    284   2     5                                      220   5       5       3    285   2     5                                      221   5       5       5    286   5     5     3                                229   5       5            287   5     5     5                                240   5       5       5    288   5     5     4                                241   5       5       5    289   5     5                                      242   5       5       3    290   5     4                                      243           5            291   4     4     2                                245   5       5       5    292   4     3                                      253   5       5       5    293   5     5     4                                265   5       5       4    294   5     5     4                                266   5       5            295   4     5     3                                296   5       5       3    302   5     5     4                                297   5       5       5    303   2     5                                      298   4       5       2    304   5     5     3                                299   5       5       4    305   5     5     4                                300   5       5       3    306   5     5     5                                301   4       5       2    (XIII)                                                                              3     2     1                                ______________________________________                                    

(2) Soil treatment test for upland field

Wagner pots, each having an area of 1/5000 are, were packed with Ubesoil (alluvial soil), and then each seed of cotton, soy bean, crabgrass,barnyardgrass, foxtail, velvet-leaf, common lambsquarter, lividamaranthus, morning glory and cocklebur were planted and covered withsoil.

Each wettable powder of the desired compounds (I) shown in Table 1prepared in accordance with Example 2 was diluted with water anduniformly sprayed on the surface of each soil so that an effectiveconcentration of the compound (I) in each herbicide became 20 g/are.These plants were controlled in a glass house at an average temperatureof 25° C. for 3 weeks, and then herbicidal effects thereof wereinvestigated.

The herbicidal effects were evaluated according to the evaluation methoddescribed in (1) herbicidal test for paddy field, and the results areshown in Table 3 with the results of Comparative chemical used in (1).

                                      TABLE 3                                     __________________________________________________________________________                   Kind of weed                                                   Crop           Crab-                                                                             Barnyard-                                                                           Velvet                                                                            Common lambs-                                                                         Livid Morning                                                                            Cockle-                       Compound                                                                            Cotton                                                                            Soy bean                                                                           grass                                                                             grass leaf                                                                              quarter amaranthus                                                                          glory                                                                              bur                           __________________________________________________________________________    7     1        4   4     5   5       5     4                                  8     0        4   5     5   5       4     3                                  12    0        5   4     5   5       4     4                                  14    0        5   5     5   5       5     4                                  22    1        5   5     4   5       5     4                                  23    0        5   4     4   5       5     3                                  29    0        4   5     3   5       5     4                                  41    0        5   5     5   5       5     4    3                             45    0        5   5     3   2             3    4                             47    0        5   4     5   5             4    2                             48    2        5   5     5   4       2     4    5                             49    0        4   4     5   5       3     4    5                             50             5   5     5   5       4     5    4                             51             5   5     5   5       4     5    4                             53    0        5   5         4       4     4                                  55             4   4         4       4     5                                  57    0        5   5     5   4       4     4    2                             65             5   5     5   5       3     5    3                             67    2        5   4     2   3       3     4    3                             68             5   5     5   5       5     4    4                             69    0        5   5     5   5       3     4    3                             70             5   5     5   4       4     5    5                             71             4   3     5   5       3     5    5                             72    0        3   3     5   4       3     5    4                             76             5   5     3   5       5     3    3                             81    0        5   5     5   5       5     3    3                             82    0   2    5   5     5   4       4     4    2                             83    0   0    5   4     3   3       4     4    3                             84    1   1    5   5     4   4       5     4    3                             89    0        4   4     4   4       2     4    5                             90    0        4   5     4   3       4                                        92             5   5     3   5       5          4                             93    0   0    5   5     5   4       4     5    4                             95    2        5   5     5   4       3     3    4                             96    0        4         2   3       2     5                                  99             5   5         4             5    3                             100   2        5   5     5   5       5     4                                  101            5         2   4       5     4    5                             102   0   0                  2             2    5                             103   2   2                                4    3                             116   2        4   4     5   4       4     4                                  117            3         4   4       4     4    5                             118   0   0    4   5     3   4       4     5                                  129   1        5   3     3   4       2     4    5                             130   2        5   4     5   5       5     4    3                             131   0   1    4   5     4                 4    5                             132   1        4   5     4   5       5     5    5                             134   0        5   5     5   5       5     5                                  136            5   5     4   5       5     4    5                             138   0        5   5     4   3       2     4    3                             __________________________________________________________________________                   Kind of weed                                                   Crop           Crab-                                                                             Barnyard-         Livid Morning                                                                            Cockle-                       Compound                                                                            Cotton                                                                            Soy bean                                                                           grass                                                                             grass Foxtail                                                                           Velvetleaf                                                                            amaranthus                                                                          glory                                                                              bur                           __________________________________________________________________________    144                4     5   5       5                                        147                5     5   5       5                                        148                5     5   5       5                                        156                5     5   4       5                                        157                5     5   5       5                                        __________________________________________________________________________                   Kind of weed                                                   Crop           Crab-                                                                             Barnyard-                                                                           Velvet-                                                                            Common Livid Morning                                                                            Cockle-                       Compound                                                                            Cotton                                                                            Soy bean                                                                           grass                                                                             grass leaf lambsquarter                                                                         amaranthus                                                                          glory                                                                              bur                           __________________________________________________________________________    196   0   1        2          2            2    2                             197            5   5     5    5      5     2                                  198   0   0        2          2      2                                        199                                                                           204                                                                           205                                                                           206                                                                           207                                                                           219                5     5    5      5                                        220                4     5    5      5                                        221                5     5    5      5                                        225                5     5    5      5                                        229   0   0                                                                   234                5     5    5      5                                        240                4     4    4      4                                        241                4     3    4      4                                        242   1        4   4     5    4      2     5    4                             243   0   0                                                                   244   2        5   5     4    5      4     5    4                             245                4     4    5      5                                        246                3     3    4      4                                        253   1   2    5   5     4    4      4     4    5                             265   1   1    2         2    4      4     2                                  266   0   0    2         2                 3    2                             267   2        4   5     4    5      3     4    5                             268   1   0    2   3     2           2          3                             269   0   0        2                            2                             270   0   0                                                                   271   0   0                                                                   272   1        5   5     4    3      5     5    4                             273   0   1    5   4     4    2            2                                  274   2        5   4     4    2      2     3    2                             275   0        5   5     3           2     3    3                             276   0                  3    2            2                                  277   0   0    5   5     5    4      5     4    4                             278   0   0                                                                   279   0   2    5   5     5    4      4     3    4                             280   0   0    3   4     3    2            3    2                             281   0   0    4   3     2                      2                             282   0   0    3         2    3      2     2    3                             283   0   0    2                     2     2    3                             284   0   0                          2     3    2                             285                                                                           286   0   2    3         2    4      4     4    3                             287   1        2   4     3    4      3     3    2                             288   0   0    2   2                 2     3    2                             289   0            2          2                                               290   0   0                                                                   291   0        2   4     2    2      4     3    3                             292   0        2   2     3    3      4     3    2                             293   2        4   4     3    5      4     3    2                             294   1        5   5     4    4      5     5                                  295   0   2    3   5     4    4      4     5    3                             296   0   0    4   5     5    5      4     3    3                             297   0   2    5   4     4    4      2     2    3                             298   2        5   5     5    4      4     5    3                             299   1   0    2         3    3      3     3    2                             300   0   0    2         4    4      4     4                                  301   0   0              2                 2                                  302   0   2    4   4     4    3      4     2    2                             303   1   0              2                      3                             304   0   0                          2                                        305   0   1                   2                                               306   0   2    2   4     4    5      5     4                                  (XIII)             3     2    3      3                                        __________________________________________________________________________

(3) Foliar spread test for upland field

Wagner pots, each having an area of 1/5000 are, were packed withvolcanic ash soil and then each seed of crabgrass, barnyardgrass,velvetleaf, common lambsquarter, livid amaranthus, morning glory,cocklebur, cotton and soy bean was planted, covered with soil and grownfor 2 weeks.

Each wettable powder of the desired compounds (I) shown in Table 1prepared in accordance with Example 2 was diluted to 2000 ppm with watercontaining a spreading agent Neoesterin (trade name, produced by KumiaiKagaku Co.) (500 ppm) and then uniformly sprayed on the above respectiveplants. After these plants were controlled in a glass house at anaverage temperature of 25° C. for 3 weeks, the herbicidal effectsthereof were investigated.

The herbicidal effects were evaluated according to the evaluation methoddescribed in (1) herbicidal test for paddy field, and the results areshown in Table 4 with the results of Comparative chemical used in (1).

                                      TABLE 4                                     __________________________________________________________________________    Kind of weed                                                                                            Common Livid Morning                                Compound                                                                            Crabgrass                                                                           Barnyardgrass                                                                         Velvet leaf                                                                         lambsquarter                                                                         amaranthus                                                                          glory  Cocklebur                       __________________________________________________________________________    5     5     5       5     5      5     3                                      6     5     5       5     5      5     3                                      7     5     5       5     5      5     4                                      12    5     5       5     5      5     5                                      14    4     5       5     5      5     4                                      15    5     5       5     5      5     3                                      16    5     4       5     5      5     5                                      22    4     5       4     5      5     4                                      23    4     5       5     5      5     3                                      28    5     5       5     5      5     5                                      29    4     5       5     5      5     3                                      31    5     5       5     5      5     5                                      41    5     5       5     5      5     5      5                               45    5     5       5     5      5     4      5                               46    4     4       3     4      4     4      5                               47    5     5       5     5      5     5      5                               48    5     5       5     5      5     5      5                               49    4     5       5     5      5     5      5                               50    4     5       5     5      5     5      5                               51    5     5       5     4      3     5      5                               53    4     5                          5      5                               55    3     5             4      4     5      5                               57    5     5       5     5      5     5      5                               65    3     4       5     2            5      5                               67    5     5       5     5      5     5      5                               68    5     5       5     5      5     5      5                               69    5     5       5     5      5     4      5                               70    5     4       5     5      5     5      5                               71    3     3       4     5      5     5      5                               72    4     4       4     5      5     5      5                               73    4     5       5     5      5     5      5                               74                  3     4      4     5      5                               75                  5     3      4     3      5                               76    5     5       5     5      5     5      5                               77    2     2       5     2      2     5      5                               78    2     3       4     4      4     5      5                               81    5     4       5     5      5     5      5                               82    5     4       5     5      5     4      5                               83    4     4       5     5      5     4      5                               84    4     4       5     5      5     5      5                               89    5     5       5     5      5     5      5                               90    5     5       5     5      5     5      5                               92    5     5       5     5      5     5      5                               93    5     5       5     5      5     5      5                               94    3     4       5     4      4     4      5                               95    5     5       4     5      5     5      5                               96    3             4     3      3     5      5                               99    3     3       5     3      3     5      5                               100   5     3             3      3     5      5                               101                                    5      5                               102                 5            5     5      5                               103                                    5      5                               104                 5                  5      5                               106                                    5      5                               108                 4                  4      5                               110                 4                  5      5                               111                 4                  5      5                               112                                    5      5                               113                                    4      5                               116                                    5      5                               117   2     3                          5      5                               118         3                          5      5                               119   4     4       4                  5      5                               120         2             5            5      3                               121                                    5      5                               122                 3                  5      5                               123                 5                  5      5                               125                 4                  5      5                               128                 3                  5      3                               129   4     5       5     2      3     5      5                               130         4                          5      5                               131   5     5                    3     5      5                               132                 5            3     5      5                               133         2       3     3            5      5                               134   5     4       5     3      4     5      5                               135   3     5       5                  5      5                               136   3     3       4     3            5      5                               138   3     4       5     5      5     4      5                               139   3     2       5                  5      5                               140                 5                  5      5                               __________________________________________________________________________            Kind of weed                                                          Compound                                                                              Barnyardgrass                                                                           Foxtail                                                                           Velvetleaf                                                                            Common lambsquarter                                                                      Livid amaranthus                     __________________________________________________________________________    144     5         5   5       5          5                                    147     5         5   4       5          5                                    148     5         5   5       5          5                                    156     5         5   5       5          5                                    157     5         5   5       5          5                                    160     3         3   5       4          4                                    __________________________________________________________________________                   Kind of weed                                                   Crop           Crab-                                                                             Barnyard-                                                                           Velvet-                                                                            Common Livid Morning                                                                            Cockle-                       Compound                                                                            Cotton                                                                            Soy bean                                                                           grass                                                                             grass leaf lambsquarter                                                                         amaranthus                                                                          glory                                                                              bur                           __________________________________________________________________________    196   0        2   5     4    2      4     3    3                             197            4   5     5    5      5     5    5                             198   1                  3           2     4    4                             199   1        5   5     5    4      4     5    5                             200                                                                           205                                                                           206                                                                           207                                                                           219                5     5    5      5          5                             220                5     5    5      5          5                             221                5     5    5      5          5                             224                5     5    5      5          4                             226                5     5    5      5          5                             229   2   1        2          2      2     2                                  230                4     5    5      5          5                             233                4     5    5      5          4                             234                4     5    5      5          5                             239                4     5    5      5          5                             240                5     5    5      5          4                             241                4     5    5      5          4                             242   1        2         5    2      3     5    5                             243   0            2     3    2            4    5                             244            4   5     5    5      5     5    5                             245                5     5    5      5          5                             246                5     5    5      5          5                             252                3     5    5      5          4                             253            5   5     5    4      4     5    5                             254                5     5    5      5          5                             265            2         5    3      2     5    5                             266   1   2        2     2           2                                        267   0   2        2                                                          268            4   4     5    5      5     5    5                             269   0   0              2                                                    270   0   0                                                                   271   1   2                   2            3    3                             272            4   5     5    5      5     5    5                             273   2        3   5     5    5      5     5    5                             274            2   4     5    5      5     5    5                             275   1        4   5     5    3      2     5    5                             276   2        3   5     4    2            5    5                             277   0                  5                 5    5                             278   0        4   4     5    3      3     5    3                             279            5   5     4    4      4     5    5                             280   2        2   2     5    3      3     4    5                             281            3   4     5    3      2     5    5                             282            3   5     5    5      5     5    5                             283   2        3   4     5    2      3     4    3                             284            3   2     4    2            5    5                             285                                                                           286   2        2   3     5    2      3     5    5                             287            3   3     5    4      4     5    5                             288   2        2   4     5    2            5    4                             289   0        2   5     5    3      3     5    5                             290   0   2    4   5     4    2      3     5    5                             291   2        5   4     5    5      5     5    5                             292   2        3   5     5    5      5     5    5                             293            5   5     5    5      5     5    5                             294   0        3   5     5    5      3     5    4                             295   2        3   5     5    5      5     5    5                             296   2        3   4     4    3      5     5    5                             297   2        3   5     5    5      5     5    5                             298   1        4   5     5    5      5     5    5                             299            5   5     5    5      5     5    5                             300   2        2   4     4    4      4     5    5                             301   2        2   5     5    5      5     5    5                             302            2   3     5    5      5     5    5                             303   2        2   3     4    2            4    4                             304   0   2              2    3            4    3                             305   0        2   4     4    2      3     5    4                             306   0   2              2           3     5    3                             (XIII)             3     2    3      3          2                             __________________________________________________________________________

(4) Foliar spread test for upland field at low concentration

Wagner pots, each having an area of 1.5000 are, were packed withvolcanic ash soil and then each seed of cotton, crabgrass,barnyardgrass, velvetleaf, common lambsquarter, livid amaranthus andmorning glory was planted, covered with soil and grown for 2 weeks.

Each wettable powder of the desired compounds (I) shown in Table 5prepared in accordance with example 5 was diluted to 125 ppm with watercontaining a spreading agent Neoesterin (trade name, produced by KumiaiKagaku Co.) (500 ppm) and then uniformly sprayed on the above respectiveplants. After these plants were controlled in a glass house at anaverage temperature of 25° C. for 3 weeks, the herbicidal effectsthereof were investigated.

The herbicidal effects were evaluated according to the evaluation methoddescribed in (1) herbicidal test for upland field, and the results areshown in Table 5.

                  TABLE 5                                                         ______________________________________                                               Kind of weed                                                                                Barn- Vel- Common Livid Morn-                            Com-  Cot-   Crab-   yard- vet  lambs- amar- ing                              pound ton    grass   grass leaf quarter                                                                              anthus                                                                              glory                            ______________________________________                                        41    0      4       5     4    5      5     2                                45    1      5       4     4    5      5     2                                47    1      4       5     5    5      5     5                                57    0      4       4     5    4      4     4                                89    1      4       4     5    5      5     4                                90    0      4       3     5    5      5     4                                ______________________________________                                    

The novel 3-alkoxyalkanoic acid derivative of the present invention hashigh selectivity to annual and perennial weeds, and also shows excellentherbicidal effect (particularly effective on annual grass weeds andbroad-leaved weeds).

We claim:
 1. A pyrimidine compound represented by the following formula(I): ##STR95## wherein R¹ represents cyano group, a halogen atom,hydroxy group or --O--R⁷ where R⁷ represents a lower alkyl group, alower alkenyl group, a lower alkynyl group, a halo-lower alkyl group ora cyano-lower alkyl group; R² represents hydrogen atom or a lower alkylgroup; R³ represents a lower alkyl group; R⁴ represents a 1-imidazolylgroup or --NHSO₂ --R⁸ where R⁸ represents a lower alkyl group, a phenylgroup, or a phenyl group substituted with a substituent selected fromthe group consisting of a straight or branched alkyl group having 1 to 6carbon atoms and a halogen atom; R⁵ represents a lower alkoxy group; R⁶represents a lower alkoxy group or a lower alkyl group; X represents asulfur atom; and Z represents --CH═ group.
 2. The compound according toclaim 1, wherein said compound is a 3-alkoxybutyrylimidazole compoundrepresented by the formula (Ia): ##STR96## wherein R⁷, R³, X and Z eachhave the same meanings as defined in claim
 1. 3. The compound accordingto claim 1, wherein said compound is a 3-alkoxyalkanoic acid amidecompound represented by the formula (Ib): ##STR97## wherein R⁷, R³, R⁸,X and Z each have the same meanings as defined in claim
 1. 4. Thecompound according to claim 1, wherein said compound is selected fromthe group consistingof:1-(2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methoxy-3-methylbutyryl)imidazole(Compound 7),2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methoxy-3-methyl-N-methylsulfonylbutanoicacid amide (Compound 47),2-(4,6-Dimethoxypyrimidin-2-yl)thio-3-hydroxy-3-methyl-N-methylsulfonylbutanoicacid amide (Compound 183),2-(4,6-Dimethoxypyrimidin-2-yl)thio-3-hydroxy-3-fluoro-3-methyl-N-ethylsulfonylbutanoicacid amide (Compound 200),3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutyryl-1-imidazole(Compound 240), and3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methyl-N-methyl-sulfonylbutanoicacid amide (Compound 241).
 5. A process for preparing the compound (Ia)according to claim 2, which comprises reacting a compound represented bythe formula (II): ##STR98## wherein R³ represents a lower alkyl group;R⁷ represents a lower alkyl group, a lower alkenyl group, a loweralkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group orlower alkoxyalkoxy group; X represents a sulfur atom; and Z represents--CH═ group,with N,N'-carbonyldiimidazole.
 6. A process for preparingthe compound (Ib) according to claim 3, which comprises reacting thecompound represented by the formula (Ia): ##STR99## wherein R³represents a lower alkyl group; R⁷ represents a lower alkyl group, alower alkenyl group, a lower alkynyl group, a halo-lower alkyl group ora cyano-lower alkyl group; X represents a sulfur atom; and Z represents--CH═ group,with a compound represented by the formula (III):

    NH.sub.2 SO.sub.2 R.sup.8                                  (III)

wherein R⁸ represents a lower alkyl group, a phenyl group, or a phenylgroup substituted with a substituent selected from the group consistingof a straight or branched alkyl group having 1 to 6 carbon atoms and ahalogen atom.
 7. A herbicidal composition, consisting of an effectiveamount of a compound of the formula (I): ##STR100## wherein R¹represents cyano group, a halogen atom, hydroxy group or --O--R⁷ whereR⁷ represents a lower alkyl group, a lower alkenyl group, a loweralkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group; R²represents hydrogen atom or a lower alkyl group; R³ represents a loweralkyl group; R⁴ represents a 1-imidazolyl group or --NHSO₂ --R⁸ where R⁸represents a lower alkyl group, a phenyl group, or a phenyl groupsubstituted with a substituent selected from the group consisting of astraight or branched alkyl group having 1 to 6 carbon atoms and ahalogen atom; R⁵ represents a lower alkoxy group; R⁶ represents a loweralkoxy group or a lower alkyl group; X represents a sulfur atom; and Zrepresents --CH═ group;as an active ingredient and a carrier.
 8. A2-pyrimidinylthioalkanoic acid compound represented by the formula (Id):##STR101## wherein R^(1') represents a cyano group or a halogen atom; R²represents a cyano group or a halogen atom;R^(4") represents asubstituent selected from the group consisting of--OC₂ H₄ Si(CH₃)₃,--OCH₂ OC(O)C(CH₃)₃, --OCH₂ OC₂ H₄ OCH₃, --OCH₂ SCH₃, --OCH₂ CN,--ON═C(CH₃)₂, --OCH(COOC₂ H₅)₂, --SCH₃, --SC₂ H₅, --SC₃ H₇ --n,##STR102## R^(6') represents a lower alkoxy group; R³ represents a loweralkyl group; and R⁵ represents a lower alkoxy group.
 9. The2-pyrimidinylthioalkonoic acid compound of claim 8 wherein R^(4")represents --OCH₂ OC₂ H₄ OCH₃.
 10. The 2-pyrimidinylthioalkanoic acidcompound of claim 9 wherein said compound is (methoxyethoxymethyl)3-cyano-2-(4,6-dimethoxypyrimidin-2-yl)thio-3-methylbutanoate (compound282).